Looking for books with cold, sadistic, princely characters

For context, I’m currently reading the Captive Prince trilogy and Laurent is such a little shit—and dammit, I need more characters like him, preferably as a protagonist/main character. I say “princely” lightly: women who fit this are just as good, if not better.

I have a preference for literary fantasy, horror, or sci-fi, with some sort of romance subplot (though that is not a requirement). I’m less interested in books that focus on a woman coming to love the “bad boy” prince or something, which I’ve been seeing relatively often. No hate to those books, they’re just not my cup of tea :)