Who Are the Most Evil, Ruthless, and Unhinged Villains in Books?

Hi everyone, I'm looking for recommendations for books featuring truly evil, ruthless villains with no morals or justification. With a distorted and cruel view of the world and contempt for life. I love stories that don't try to excuse them. Some of my favorite characters are Hannibal Lecter, Dexter, Anton Chigurh, Fang Yuan and Judge [...]