Benjamin Huffman has done some stuff I like, a scholar class which I always forget to play because we use dnd beyond. He also did manuscript class (arcane half caster) which looks good, though I think I'd probably make some changes to it.
I've been seeing a superhero class that sometimes pops up on reddit with a new version, the Empowered by u/Tandra_Boy. Not sure if it is the latest version, but I've downloaded version 2.0. I'm just trying to work out if it's something I want to add to a regular game or if it is something I want to use for a fantasy Avengers type game.
Only one I've played is the Blood Hunter, and I'm enjoying it a lot so far. Air genasi order of the mutant. Mobile feat and using the scion of elemental air feat from the new UA.
Lots of options to pick from, while being another pure martial so I don't need to be a yet another full caster. So far I'm finding that it's a glass cannon. Dishing out a lot of damage, but unable to take it. I wish it had more subclasses though. Maybe a vampiric one and a draconic one.