I don't really think of Joe in those terms, he was always both/and, but if I were to pick one album (as opposed to solo), this one here might not be my final answer, but it is my first one:
aka
It seems funny/odd to me think of Joe in those terms, though...perhaps even counter-intuitive ..would it be ok to say "unnatural"? That's just not how I've ever heard Joe...
Extended as fuck sometimes, yeah, but never "out" in any way, not even with the overtones and stuff. As with Pharoah and Ayler, it was all at the service of a very developed technical expertise. Spontaneous impulses, perhaps, but known outcomes once those impulses got into the pipeline of playing.
I know that's why some people have had reservations about him, they maybe see it as a lack of boldness or character or something, and I get that intellectually (to the degree that I do get it), but my god he just did whatever he wanted to do - and what he wanted to do, he could pretty much damn near always do it, and it always fell into place, never "out" really, just there, in the place where it was.