We always hear people discuss skill caps and whatnot. Easy champs vs hard, whatever. So which champion do we think has the lowest skill cap? I really don't know who I'd pick. I can think of a few easy/binary champs, but they still have higher skill caps than people think.
by far.
And to make clear to the rest of the people posting here ignorantly.
Skill Cap =/= Skill Floor.
Skill Cap = The amount of potential that skill can provide. Skill Floor = The amount of skill required to use.
and 
are always great examples of this. They are very easy to use but mechanically have a lot of depth.
Edit - And yes strategical skill is also a part of the game but not the champ itself. You can use a champ uniquely out of its normal use but that has nothing to do with the champ skill.
? Q them whenever you can, R for assists, W when stunned, E when you go in to fight or need to run away. It's hard to think of a way for a Gangplank player to show their mastery.
adc
Riven. You just do your buttons and then back out. She's very forgiving in the positioning department and securing kills isn't a series of careful trades most of the time. Generally you just blow your load and 100-0 them in lane, very easy to force kills with her.
Amumu is also mind numbingly easy. Just walk at them and hit R when there's a lot of people around you. Strategically he's hard to fuck up.
If you're looking for a very mechanically simple champion: 
.
He's got an experience and game-knowledge curve, but skill wise, the cap is very low.
I would also recommend 
, but he is more complicated.
I'm not really sure. I'm kind of thinking there's not that much to 
but i'm far from an expert.
My first instinct was 
, but I have to admit is probably the answer.
Soraka support is fairly brainless (And I do play Soraka support). Just sit back and press W no your ADC.
Define easy. Easy as in able to contribute to the team even if you're feeding and still able to do very well? Or easy as in being able to wreck people quickly, or learn a champion quickly?
I say 
and 
are among some of the easiest. If you know how to position yourself correctly and have good mobility, then is easy. If you know how to engage and when to go in for kills, then is easy, not to mention he's a tank and does tons of damage. And can still wreck people even if he feeds, because he needs one knock up, and needs an 
and 
to actually even be worth a damn to pierce through armor and wreck you.
As for learning quickly, is easy, get your stun up and burst them down with your combo, or 
, just ult, you're bound to get a kill because you can't be targeted.
But honestly, whenever I hear someone say in-game "oh he/she is op, gg", I find it bullshit because any champ can be OP if you play them right, it just depends on how good you are with that champ. Some champs are just more easily OP than others.
I'd say Morgana mid and Support :v
My list for the mechanically easiest champions:
**ADC: **Tristana Mid: Swain (although last-hitting can be harder than average)/Morgana/Annie **JG: **WW **Top: **Nasus/Singed (but he requires a dramatically different play-style and more game knowledge than average)/Garen Support: Soraka
WW, Garen, and Kayle are pretty easy to use
