League of Legends objectively best tier list

Warning: The list is in no way ordered from best to worst, a champion at the bottom of B Tier isn't necessarily worse than a champion at the top of B Tier.

S Tier (Best champions, overpowered)
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Best of S Tier: A 3-way tie, Fiora,Ezreal and Le Blanc are all powermongers who are extremely hard to deal with and can very easily carry an entire game, with their weakest attributes being better than some champions' strongest attributes
Udyr
Fiora
Ezreal
Le Blanc

Worst of S Tier: Udyr, Udyr is a god of the jungle and has a well deserved spot in S Tier  and him being the worst is just because he isn't as overly strong as the others on the list.
A Tier (Very good picks, rarely a bad choice)
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Best of A Tier: Zed, Zed is strong in almost every category you can possibly think of, simply the only thing keeping him out of S tier is that he falls just short of the strength needed

Braum
Thresh
Gnar
Jarvan IV
Gangplank
Zed
Amumu
Miss Fortune
Nasus
Tahm
Ekko
Jinx
Poppy
Bard
Kog'maw
Vayne
Lee Sin
Soraka
Lux *Note: Lux is only in A tier due to people's inability to play against her, otherwise she would be in B or C Tier
Lucian
Riven
Fizz
Corki

Worst of A Tier: Jinx, Jinx is arguably the best late game hyper carry in terms of damage output and range, but she has no mobility outside of a speed boost, no way to deal with tanks, and her slow having a cast time. The reason that she stays in A Tier is because her damage output is just too high to justify having her in B tier
B Tier (Average or slightly above)
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Best of B Tier: Nautilus, this is a very hard one with so much to choose from but Nautilus offers the most CC in the game with a very punishing early game and one of the best natural tank in the game, if he did a bit more damage or his slow was a bit stronger, he'd definitely make into A Tier

Trundle
Shen
Alistar
Garem
Gragas
Twisted Fate
Tristana
Lulu
Twitch
Rumble
Darius
Graves
Ashe
Viktor
Maokai
Mundo
Talon
Nautilus
Kalista
Sion
Leona
Brand
Draven
Morgana
Malphite
Caitlyn
Malzahar
Master Yi
Yasuo
Wukong
Rammus
Kindred
Shyvanna
Karthus
Rengar
Jax
Sejuani
Xerath
Jayce
Vladimir
Nidalee
Rek'sai
Pantheon
Sivir
Jhin
Ahri
Janna
Worst of B Tier: Mundo, even in his hay-day Mundo was never the greatest, his strengths lie with him playing against a heavy magic team, but being able to have half your kit turned off via ignite and being horribly easy to kite mean that even against a team he counters he's never really horrifying since he doesn't have any CC. But his strong tank stats and definitely respectable damage keep him from falling to C Tier

C Tier (Below Average or only good for counters)
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Best of C Tier: Vel'Koz,  Vel'Koz is the best of C Tier because of his early poke and the fact that he does have good damage late game, and has tank killing capabilities, any number of even minor buffs would put him in B Tier
Vi
Vel'Koz
Kennen
Swain
Akali
Diana
Blitzcrank
Elise
Syndra
Yorick
Cho'Gath
Warwick
Teemo
Kayle
Kha'Zix
Ziggs
Renekton
Nocturne
Cassiopeia
Quinn
Hecarim
Heimerdinger
Annie
Volibear
Nami
Ryze
Xin
Lissandra
Nunu
Azir
Illaoi
Zac
Shaco
Urgot
Veigar
Olaf
Fiddlesticks

Worst of C Tier:Blitzcrank, Blitzcrank not being in D Tier may be surprising, but it's hard to put him down low when his grab is so powerful even against strong players, but considering he only has one ability, he's lucky to be in C
D Tier (Only good for counters, even then, questionable)
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Best of D Tier: Tryndamere, though the highly contested spot for best of D could change easily based on what you value in a champion, Tryndamere with his oppressive early game and the ability to split push late game makes him slightly viable
Irelia
Taric
Kassadin
Zilean
Anivia
Evelynn
Singed
Tryndamere
Katarina
Mordekaiser
Galio
Worst of D Tier: Katarina, her recent buff was barely even one, and could be considered a nerf as it forces her to push lane, the only reason she's out of F Tier is that she has a blink and in some cases can dish out heavy damage

F Tier (The worst champions in the game, do not pick even for counters)
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Best of F Tier: Zyra, Zyra has decent early poke and her ult isn't the worst, she could be upgraded if she even just had more base stats or her spell radiuses were increased.
Aatrox
Zyra
Varus
Karma
Sona
Worst of F Tier: Sona, this needs no explanation at all