Based on normal habitability, max AI civs, grand admiral difficulty:
SS Tier
Hegemony
S tier
Nothing because nothing even comes close to hegemony now
A tier
Scion, Doomsday w/ assimilator robots (not genocidal though because genociding is AWFUL)
B tier
Everything not listed
F tier
Syncretic Evolution, Lost colony, Common Ground, Galactic Doorstep, Calamitous birth, post apocalyptic. You know all the same crap that sucked before basically.
Honestly most of the OP ones have been nerfed pretty hard to the point where there's nothing too imbalanced except Hegemony, which is only imbalanced because starting in a federation with GA AIs is OP and can get you a 200 naval cap fleet for free by 20-30 years in just by spamming naval cap and taking the +100% contribution perk. Scion is still basically a gigantic cointoss to get a fleet that won't reinforce and is roughly as good as Hegemony gets all the time, except hegemony will eventually get 400 and 600 naval cap fed fleets.
There's definitely a few better than average like on the shoulders of giants or tree of life but nothing strong enough to rank a whole tier above the other stuff I consider B tier.