What ulti has the most impact in any given game regardless of team-comp (or title)?. Standalone ultimates. No combo with other champion ults or abilities (like Yasuo ulti). Not dependent on many "if-s" (Yi ulti is a great example "if he gets x kills it's the strongest" or "if he does not die" or "if enemy team has no CC"...).
Support Position4 votes
Oh you wanted to do damage in burst meta? Have fun with cooldowns. Oh and... you're dead.
Hamerfal1 votesI think you are right. Taric might have the best ulti in the game. His ult is not affected by team-comp. It is almost impossible to miss (unless you and your W partner die after you cast it). Worst case scenario only 1 person gets invulnerable. Best case scenario the whole team is invulnerable. Good for engage + disengage.
Support Position2 votesLiterally the fattest NO U card in the game
Tr4shB4NSYST3M3 votes
and the new 
ult arguably have the highest POTENTIAL impact if they hit 5, 
and 
get honorable mentions in this respect as well.
Hard to disagree w/ the guy who said that ult used intelligently is super impactful.
R will always be strong.
And A thought no one else had: 
Ult, because to some degree it warps the game and forces the enemy team into sweepers or other vision denial.
Ariel the Cruel2 votes{quoted} And A thought no one else had:
Aw, you beat me to it. On ARAM, it goes a step further and actually costs the other team gold.
FakeGravity2 votesi won a 4 v 5 match once as teemo entirely because the enemy team got tired on trying to push, too many mushrooms and i was too fed so even if they were able to kill me the damage was done, their spirit was broken i guess
FioraWillCarry2 votesMalphite Amumu Taric Aphelios
Hamerfal3 votesI still don't know what that champ does (aphelios) he has 5 forms , 5 Q's , 5 of everything. Give me a break.
Thingamajig2 votesNocturnes ult TFs ult
Hamerfal1 votesTF ult is indeed insane. I don't know what to say about nocturne ult tho. It is good against champs like TF/ Shen. Other than that it's not that great. It spokes players when he ults but that kind of it.
Thingamajig4 votesTF ult is indeed insane. I don't know what to say about nocturne ult tho. It is good against champs like TF/ Shen. Other than that it's not that great. It spokes players when he ults but that kind of it.
vision denial for objectives is great
Jaspers1 votesIn terms of late game teamfight. Urgot - removes the tank from the fight even at 25% hp.
EDIT: Wait, forgot, no one plays tanks anymore. :P
Hamerfal1 votesUrgot ulti is strong and has insane potential. But I'm going to debate with 1 question: How often do you get a 4 man fear after killing exactly the tank? I haven't done it once since I don't play the champ. But I think it is very very hard to pull off.
Jaspers1 votesIt's not the fear that's the key (although that is powerful), it's not having a 1500HP tank on the front line. The 25% bullcrap part of his ult makes tanks basically pointless. (Reason if I play top, I ban him).
Cind3rkick1 votes
Hamerfal1 votesAll these ultimates have insane potential. But every single one is heavily "if" dependent.
Cind3rkick1 votesAll these ultimates have insane potential. But every single one is heavily "if" dependent.
So is every ultimate though. Aside from Soraka and Karthus, what ult isnt heavily "if" dependant?
Inkling Commando1 votesi'd have to go with 
a chance to undo what was done.
The thigh guy1 votesOrianna ult. As soon as orianna is locked in, the team fight advantage is in ghat teams favor entirely because that ult is a game changer.
Hamerfal1 votesI personally don't respect the champ by any means. I still might not be good enough to understand why even pro players pick her.
The thigh guy1 votesI personally don't respect the champ by any means. I still might not be good enough to understand why even pro players pick her.
Her ult pulls everyone hit by it into the center. Which in turn means that you are grouped up closely for aoe damage.
The most devastating combo with this is ori and brand. It ori hits even 2 people with her ult. They die without any counterplay past not getting hit by it.
Troll Slaiyer1 votesgood question. i think anyone with aoe hard cc is pretty much tied.
Zane Zephyr1 votesI'd probably say gragas. Once he presses R all bets are off the table until its done and there's no telling how it's going to affect the following play until it lands.
Hamerfal1 votesVery very good point.
Infernape1 votes 
A well time ult from one of these is GG
RyzeRework1 votesThe most impactful ultimate...
I mean any champions with 5 free seconds of damage.
Hamerfal1 votesI don't know about that.
RyzeRework1 votesi mean imagine if jax had that ultimate instead of his ult he would be nuts or if any adc had that kinda ultimate the ultimate itself is busted
Thefrostyviking1 votes
My eternal nemesis when on the enemy team, does not matter which role i am playing but when i am going for kills and´s its even remotely even she will ult, and it usually screws me over somehow.
Second option would be 
.
Sire Hippington1 votes
just gain so much presence through their ult.
Not only becuase of the semi global dash, but the global nearsight is insane and very underated
, the mix of damage and slipperiness makes her insane to deal with 1v1 , she has the potential to get a 1 button penta, the damage gets just so insane vs multiple targets
is a catch all case, it's strong to catch out targets, it can devastate teamfights, it can setup combos in a 1v1, it can be used to disengage, it's just very versatile.
VonCesaw1 votes
With a good player
If they can hit it at the right time and place
If they get to exist to the middle of a teamfight
Beerstein1 votesNo one has mentioned Bard because he's unpopular partly because his ult is hard to perfect in gameplay. However, when you do his is easily the most impactful. You can disable towers, specific enemies, specific allies. Use it to freeze enemies for sales to position for a kill, pull half a team it of the fight etc. It's hands down Bard imo. Not even a contest.
Edit: my bad, one mentioned him.
kda akali1 votes
global damage + shield + aoe + vision
Vlada Cut1 votes 
.
And a cherry on top,
Wait, this looks like an actual teamcomp LOL
Xhaiden1 votes ofc. Control wards and Oracle might help a bit - but is someone play Teemo in minefield mood - it's close impossible to clear all of them. Cause of his ultimate - Teemo seems to have the highest champ for a comeback/win - while being a part of a weaker comp or a weaker team (late game scores like 14 - 38). For this reason - this is actually the most hated ultimate in League of Legends. Lost games that seem like free win (bot, mid and jungle - were on the loosing side) - and won games where half the team was spamming FF since min 15 (seemed like a sure loose at that point) - cause of a minefield Teemo. A low skill passive ultimate that can kill you - without even being focused (Teemo could farming at that time - in the other side of the map). Unrivaled since 2009...