For Maynard... I can't decide. I keep thinking INTJ or ISFP (e6), though INFP is possible. Definitely feel a more Fi/Te and Ni vibe, though not sure which is more prominent. He has these moments of playfulness, which make me think more ISFP. But other than that, I don't see a whole lot of Se.
I've always been a fan of Tool, but never really looked into Maynard until now. Interesting background: military, art school, comedy, wine making, martial arts.