what villain is outright evil and just the best at it
I'd have to go with one of the mystic entities like Dormammu, Cthon, Surtur, or some other inter-dimensional being. Thanos belongs up there with them with all his intelligence, strength, technology, and other skills. Below them, I would place Kang, Doom, and Ultron as the main threats. Never read much X-Men, so I don't know where Apocalypse would rank but I know he is up there.
The score so far,
Dr Doom 3
Green Goblin, Galactus, Cthon, Surtur, Kang 1
Not sure that I agree with this though. The title of this thread is kind of misleading, because the OP's post asks for the most evil, not necessarily the most powerful.
I haven't read any comics about Dormammu or Cthon or Surtur, but I think they are more powerful than Thanos. And really, Thanos isn't that evil either. Just misguided (like Enosisik2 said).
I vote Bullseye for the most evil. He freaks me out.
Most powerful crossover villain would be Thanos with an Infinity Gauntlet or Onslaught from the original crossover Prof X and Magneto psyche combo plot. They've both messed up the majority of the Marvel Universe coming at them at once. Dr. Doom would likely be the most powerful "casual" villain in a sense that he's regularly encountered and doesn't require crossover events to defeat, but still has done some miraculously powerful stuff.
In terms of sheer malice and evil, I'd go with Apocalypse or , again, Onslaught.
Thanos , Galactus , Apocalypse , Ultron , and Dr Doom.
yeah, these are rather the big ones. I have a hard time deciding between them for who is the most powerful; solid top 5, for sure. Although I'd be inclined to include Mr.Sinister (since his most recent incarnation in the last volume of UXM) and some versions of the Hulk.
Most villains aren't really evil by definition. Galactus is a force of nature, Lizard wants to cure humanity of disease and injury, Thanos wants to impress the woman he loves, and Ultron wants to make earth a perfect society, the list goes on and on. Some villains are just plain evil: Red Skull, Joker, Dr. Doom , Green Goblin, Apocalypse. IMO, Red Skull is the most evil though.
I would probably say Apocalypse probably has the edge on Thanos. Thanos if he has the guantlet is one thing, but without it Apocalypse would beat him imo. Plus Thanos has had stories where he is almost good, at least nuetral. Apocalypse is always evil.