[HoneyBadger]

I'd say EA R'lyeh Aboleths are the most objectively evil. 1-they're inherant mind-controllers and avowed slavers, 2-they're lobotomizers, and 3-they use their own immature offspring in war. They're utterly ruthless and almost utterly selfish.

The only saving grace they have, at all, is that they consider their females to be sacred, so they do care about the propagation of their species to some extent.

That goes well beyond emnity towards another species, as well as any "natural amorality". And they don't have the excuse of being insane, like later R'lyeh does.

By the way, I haven't noticed any R'lyeh nations summoning Cthulhu, but I sure would like to. Maybe someday the Devs can create an underwater/Lovecraft version of Tartarians?