What’s the Best 3rd Party Content?

I am looking to expand on D&D 5th edition but I’m a bit overwhelmed by the sheer amount of 3rd party content that’s out there and worries how balanced it is. I’ve played for over five years now and I’m looking for some new subclasses, abilities, feats etc. I’m aware of Griffon’s Saddlebag and Ryoko’s Guide but what are some other great content books or resources that expand on the current 5e?

Let me know your favorites!