IMO I’d probably have to go with Jimmy from Mouthwashing. I think that he’s a very good representation of a very real kind of person. A person who is narcissistic, who is unable to take accountability for his actions, and who refuses to see himself as a monster, even as he continuously does monstrous things. He’s basically like a co-worker from hell, which is part of why he’s so horrifying.
Moralintern/Mercenaries from Disco Elysium
Edit: Actually scratch the Mercenaries. They’re “just” racist murderers. The moralintern, in propagating a murderous system they will defend with nuclear weapons which is slowly but surely destroying the world is much more terrifyingly relevant. Although it’s so relevant they might be disqualified from the list for literally just being capitalists