So far, the class I had the most fun with was artificer. There was so much room for creativity, even though I was a half caster. The class features were just so great for anything out of Combat. Also, tanking was super fun, I made my whole gear load out magic so my AC was super high. Then I would just cast blur on myself and run head first in to the fight.
Idk if we're on the topic of 3rd party content, but I'm currently playing a changeling illrigger, which is an MCDM class. It's ridiculously fun. The way that changeling and the shadowmaster subclass synergize with each other is awesome.
I honestly don't know, pretty sure I saw it on Reddit a while back. I have it saved because I have a buddy who literally formats his character backstories like this and I like to poke fun at him.