Cant you find most champions here in Dota 1 / Dota 2 anyway?
Aatrox Anti-Mage jumps in, good damage, good chase
Ahri Storm Spirit "come back here" ability, huge mobility
Akali Riki invisibility, huge assassination potentional, gap closing dash
Alistar Centaur Warrunner jumps on top of enemies, enjoys taking damage)
Amumu Treant Protector hits huge teamfight changing ults, becomes utility after that
Anivia Leshrac solid poke in lane, reliant on hitting stun for kills
Annie Warlock great harass and lane support, game changing ultimate - even better than Tibbers!
Ashe Drow Ranger auto attack slow, huge damage, very squishy
Azir Invoker control-based mage, can poke you down or jump in and create havoc
Bard Earth Spirit reposition allies, CC enemies, great at roaming
Blitzcrank Pudge grabs enemies, holds them down, can be mobile
Brand Zeus great AoE damage in fights, solid in lane, not very mobile
Braum --- ----
Caitlyn Sniper stand faaaaar away, then snipe
Cassiopeia Medusa late game carry with teamwide stun
Cho'Gath Elder Titan ranged disable that sets up other abilities
Corki Morpling(not Gyrocopter!) good chase potential and survivability, needs good positioning
Darius Axe pretty much the same champ/hero, get in there and dunk
Diana Templar Assassin does massive damage once on top of people
Dr. Mundo Abaddon sticks to enemies, cannot be killed late
Draven Clinkz massive damage, good chase, but easily killed
Ekko Weaver gets on top of enemies, does sustained damage, has a panic button
Elise --- ----
Evelynn Riki constantly invisible, seeks and destroys carries
Ezreal Queen of Pain good poke, good burst, good mobility
Fiddlesticks Witch Doctor bouncing CC, good sustain, teamfight wrecking ult
(Old) Fiora Juggernaut farms a bunch, then wrecks teams with slice-n-dice ult
Fizz Puck has bullshit amounts of mobility and dodge potential, ult changes teamfights
Galio Disruptor has ranged utility, and an ultimate that locks enemies down
Gangplank Kunkka constant obnoxious poke, good chasedown, both pirates
Garen Necrophos huge sustain, constant damage, lockdown ult that does missing HP damage
Gnar Earthshaker waaaay too much CC, waits for perfect initiation moment
Gragas Brewmaster great survivability and on-top-of-you damage, disrupts teamfights
Graves Luna clears waves like nothing, bursty ultimate
Hecarim Spirit Breaker/Centaur Warrunner SB:comes from where ever on the map to chase you down CW:extremely fast initiation and CC
Heimerdinger Venomancer drops units to attack for him, good CC otherwise, obnoxious to lane against
Irelia Slardar great single target focus, can chase with ease
Janna Keeper of the Light ranged poke and teamfight disruption, very squishy
Jarvan IV Clockwerk gets on top of you then holds you there until his team arrives
Jax Huskar goes in hard, gets massive resistances while fighting
Jayce Troll Warlord can be ranged or melee, good poke, better on-top-of-you damage
Jinx Bloodseeker gets one kill and goes absolutely ham, can still be focused down
Kalista --- ----
Karma Shadow Demon protects allies or sets up kills for team, good poke, good chase
Karthus Zeus farms in lane, hits R for kills later (except Zeus is viable)
Kassadin Anti-mage goes OOM really quick, can chase well
Katarina Ember Spirit goes in from range and hits one button and wins the fight.
Kayle Terrorblade bad in melee form, really good in ranged form, great physical DPS
Kennen Razor focuses down carries, then rains down lightning upon their souls
Kha'Zix Ursa Obliterates targets, but only one at a time (Ursa needs blink for Kha-like mobility however)
Kog'Maw Viper one-dimensional carry, does great damage, but still killed fairly quickly
LeBlanc Meepo locks you down then blows you up, killed quickly if not careful with positioning (Meepo clones aren't clones though; if one dies, they all do!)
Lee Sin Tusk great initiation and damage, locks down enemies and allows your team to do the hard work
Leona Ogre Magi beefy support with great lockdown, stun a bunch and allow your team to kill
Lissandra Puck ranged initiation, disables enemies and holds them in place while dealing good damage
Lucian Weaver sustained damage due to double-procced auto attacks, good mobility but still bursted easily
Lulu Oracle great utility, good damage, but primarily focuses on saving allies
Lux Lina good lane harass, stun sets up burst combo, ult is long ranged and hurts
Malphite Tidehunter almost entirely ult reliant, decent chasedown after ult is used, innately tanky
Malzahar Bane find a carry and hold them in place until they drown in tears
Maokai Undying great at weakening enemies while allies or other units do the work, absolute monster with ult up
Master Yi Ember Spirit great AoE damage with huge chase potential and survivability
Miss Fortune Luna good lane harass and kill potential, but reliant on ultimate of teamfight damage
Mordekaiser Doom one dimensional and not very mobile, but can ruin anybody's day by hitting R then nuking
Morgana Shadow Shaman great disable and AoE damage, ult dissuades enemy from fighting
Nami Crystal Maiden very squishy, but makes up for it through great early game CC and huge ultimate pressure
Nasus --- ----
Nautilus Tusk engages with ease, disables one target for an extremely long time, hard to kill
Nidalee --- ----
Nocturne Night Stalker/Spectre NS:good roaming with great DPS, CC good for killing, inflicts darkness S:global ult pressure, great chase due to trail
Nunu Phoenix does low damage in general, but ult creates enormous pressure
Olaf Lifestealer thoroughly enjoys slowing people and auto attacking until the enemy dies, kited easily, fairly beefy
Orianna Magnus solid lane poke, farms quickly, teamfight winning ultimate
Pantheon Wraith King one-dimension playstyle of stun then hit, but a nuisance to play against
Poppy Ursa very auto-attack reliant,massive damage reduction, screws over a single target
Quinn Razor great anti-carry, renders enemies near-useless while dishing out massive damage through auto attacks and ultimate
Rammus Axe enjoys being attacked, taunts enemies and deals huge AoE damage
Rek'Sai Sven with a TP scroll? great AoE disable, clears waves and the jungle quickly through cleave
Renekton Huskar major lane bully, enjoys diving a team's backline and does so with ease
Rengar Nyx Assassin disables a target, deals massive damage in super short amounts of time
Riven Faceless Void requires lots of farm to be effective, good mobility, teamfight changing ult
Rumble Timbersaw sits inside a mech, great damage and chase, huge damage in ult creates zoning pressure
Ryze Bristleback constantly sticks to you, is unnecessarily tanky, deals constant damage
Sejuani Enigma very ultimate reliant, good jungle clear, offers little damage but much CC
Shaco Phantom Lancer creates illusions of self to deceive enemy and deal tons of damage, very mobile and good poke
Shen Chen (lol) global ult allows allies to play more aggressive, deals little damage otherwise, good CC if used properly
Shyvana Slardar farms for a bit, then obliterates one target at a time
Singed Batrider tries to be as much of a nuisance as possible, deals DoT damage and displaces enemies
Sion Centaur Warrunner meanders in, attempting to tank damage so his team can clean up, good disable when used properly
Sivir Gyrocopter requires good positioning to farm, fight, and siege properly, good ult usage wins fights
Skarner Batrider rush into the enemy team, grab the carry, drag them back screaming to your team
Sona Dazzle good balance of heal, damage, and survivability for your carries
Soraka Omniknight deals good damage, crazy amounts of healing, and protects allies from incoming abilities
Swain Death Prophet renders enemies fairly useless, all whilst doing passive damage from your ult
Syndra --- ----
Tahm Kench Io provides global map pressure for you and an ally, good damage and protection of allies
Talon Phantom Assassin jumps on and decimates an enemy, dealing massive damage with good escape and survivability
Taric Ogre Magi primarily a stun machine, gives allies stats to help kill
Teemo Techies indecent human beings pick these two
Thresh Mirana roaming support reliant on a skillshot, decent mobility, gets allies into fights
Tristana Phantom Lancer pushes like an animal, has good escape, can still kill with ease
Trundle Undying creates havoc in teamfights, doesn't need too much farm to be effective
Tryndamere Wraith King plays recklessly with consequences, crazy good with farm, has no fear of dying
Twisted Fate Ember Spirit can roam without worry due to mobility given by ult, easily killed later but good damage
Twitch Clinkz invisible assassin-carry-DPS machine, killed incredible easily but deals enough damage to where it usually doesn't matter
Udyr Legion Commander rotates between jungle and lanes to create kill pressure and snowball incredibly hard
Urgot Viper sustained damage, killable yet beefy, incredibly ugly creatures
Varus Windranger long range damage with extremely high DPS, still killed fairly easily
Vayne Spectre incredibly good carry that's terrifying late, possibly best in the game
Veigar Outworld Devourer keeps his int high while stealing it from his enemies, then doing burst damage with said int
Vel'koz Skywrath Mage very high magic-based damage whilst sacrificing mobility and survivability, ridiculous ult damage