well.. the leviathan(psychopath) dick and the demon(sociopath) crowley
the almighty dexter (a similar sociopath to the harvey dent character)
harvey dent and the joker(both sociopaths though at different ends of the spectrum)
the magical una mens from lost girl season 4 http://lostgirl.wikia.com/wiki/The_Una_Mens they mirror any attack used against on them though the wanderers foresight was able to indirectly counter their attacks if he wasn't directly using it against them so there was a loop hole to eventually stop them and they where like a hybrid of a psychopath and a sociopath i suppose...
then the almighty and powerful death who is everything and nothing everywhere and nowhere he is considered to be neutral he is pretty much the "true god" that is mentioned in gnostic text an eternal that exists outside space time and has the high end psychopath appearance where he is constantly thinking about food(kind of like leviathans) (probably similar to homer simpson) and he makes food references a lot..