Psychopath dark fantasy?

When I was younger / an avid reader I used to love novels like The Collector, The Stranger, Engleby, A clockwork orange, etc.

But I also love dark fantasy: ghosts, vampires, werewolves etc.

Anything that combines both of these criteria?

Thanks for reading this, hopefully someone knows of something, and I promise I'm not a psycho myself <3

EDIT: edited to make description more conckse