There is no actual objective tier list. That's sortof impossible, because most Commanders aren't particularly well-tread territory. That said, you can find the
closest thing to a consensus (the cEDH tier list) here.
Highly recommend treading lightly with that information, though- as cEDH has very specific decorum, and mindset. Most of the information is purely speculative within their community, and there has been shifting in those ranks at a fairly constant pace. The generals are based on the power of established builds in a competitive environment. They get innovated pretty regularly, and their aggregate data is lacking, since it's based on experience instead of sourcing concept decks from the web.
BUT WAIT, THERE'S MORE.If you want a functional model, which condenses available cEDH data, here goes...
Quote:
SIMPLIFIED EDH TIER-LIST-Tier 1--This general either:
>>Tutors for combo pieces
>>Creates an infinite mana combo (or such ridiculously large sums, that it's functionally infinite)
>>Facilitates a player drawing their entire deck or getting infinite combat steps/turns by assembling a source of infinite mana
-Tier 1.5--This general either:
>>Tutors for combo pieces
>>"Storms Out" (mass spell recursion translating to something close enough to "going infinite")
>>Creates exceptional tempo swings/breaks in relevant cEDH tested decks
-Tier 2--This general:
>>Has a unique ability, cost, or other flavor of utility, but does not have an established deck catered specifically to it. Creatures as a card type are pretty good at being turned into card advantage, and most of these things have some odd way to create CA, or something similarly relevant. They tend to have unexplored niches.
>>Is not strictly worse than another general (in the way that
Jerrard of the Closed Fist is strictly worse than
Ruric Thar, the Unbowed-Tier X--This general:
>>Is completely novelty
>>Gets points for swagger
>>Is a Legendary Creature
There's no reason to have any more tiers than that. If someone can think of a clearer razor for a lower resolution summary that is closer to objective truth- good on you, homie. If not, I still won't call it objectively true, but hopefully clear enough to be a good model.