Books with dark magical vibes

Hello! I've been really getting into the old dark magic aesthetic and was wondering if anyone had any books that had similar vibes. Examples of the kind of world I am looking for are BBC Merlin and Harry Potter (I love the world, but pls no jk books)

I really like the mix of magical people, politics, and academia. I'm also partial to found family. If anyone can think of a book that fits or kinda fits this, please let me know!