Sheesh, it took 38 posts for someone to mention him? People just don’t appreciate the classics any more. And people tend to look at me funny when I mention that that play has a happy ending.
To me the best literary villian is “Mrs Danvers” from the book Rebecca.
I like it because she’s never really overtly evil but that level of total visciousness is always simmering just below and perhaps at the end it finally surfaces. Though you can’t be sure even then. (I won’t ruin the ending)
Actually Rebecca would be a boring story without Mrs Danvers hovering around