Spoiler for like, any book existing.
I think mine has to be the villain in Mirror Man. Idk, he wasn’t intimidating, he wasn’t interesting. He was meh.
Also the villains from The Chain. Dear God they weren’t sympathetic in the slightest. The book tries to act like they were atleast pitiful but FROM THEIR INCEPTION, they were just evil assholes who enjoyed causing pain. The book itself wasn’t all that great anyways.
pretty sure Randall Flagg fits the stereotype- desires no more than to bring terror and misery. cold, calculating, superficial. charming yet something is palpably amiss about him. utterly devoid of humanity. (and he is literally the Devil incarnate)
Isn’t he quite literally a personification of evil? The opposite of the black woman (forgot her name). Hard to beat that at any rate.
He did have about two lines of backstory that were mentioned right before his death.
He’s all over the Stephen King universe.