He comes out of the psychedelic blues scene in the US from the late 60s, so of course there's some "weird" stuff in there. And he's definitely more than his 70s hit songs which kind of turned into college party anthems in the 80s & 90s.

Depending on what you're into, a deep dive might yield some of his more interesting stuff.

Also, in general.. it's often the music you find "weird" that ends up being some of your favorite stuff as your ears attune to it, while the stuff you like right away can become boring and disposable.