The Magicians. It’s like a more mature and dark Harry Potter/Chronicles of Narnia crossover. It has really good character development and isn’t afraid to have fun with things like musical numbers and self aware plotlines. The first season is the weakest of the bunch, but it’s still pretty good. So give it a chance past then if you are still on the fence.
I’ve not read the books, but that does describe Q decently, though I think the show probably toned it down a bit from things I hear others say.