Eleven of the vilest villains in horror fiction

J.R.R.R. (Jim) Hardison is the author of the humorous fantasy adventure Fish Wielder and, more recently, Demon Freaks. One of his eleven top vile villains in fiction, as shared at the the B&N Sci-Fi & Fantasy blog:Dark from Something Wicked This Way Comes, by Ray Bradbury

While we’re on the subject of seductive, evil tempters, I should probably mention the mysterious Mr. Dark. Who he is exactly