I love Sonny Simmons. Firebirds with Prince Lasha and Ancient Ritual on ESP were my entry points and they're the ones I would start with. They are different enough in setting and period that you get a good well rounded picture.
There's a documentary out there about him on Amazon called "The Multiple X-Rated Truth". It has lots of footage of him and, weirdly, Anthony Braxton. It's compellingly unpolished as a documentary and worth tracking down.
Nice! That really is a binge. Let us know how you get on when you get to the crazy listening binge part.
I'm planning something similar on Bandcamp this Friday (my self-deluding justification being that it is important to support artists at this time). If anyone has any crucial recommendations burning a hole in their head let me know - including any of the above (although Clean Feed's presence on Bandcamp is spottier than some of the other labels mentioned above).
I hadn't seen this list before. Thanks - there are a couple that had escaped my notice. Useful stuff when, as you say, these records aren't really being discussed.
Discogs is real hit-or-miss. Had a seller from Pittsburgh last year refuse to issue a refund on scratched Dave Liebman CD which was returned to him via tracking, then left me negative feedback claiming I was a horrible customer- very unpleasant and professional.
Otherwise, many Discogs sellers are reliable and quick to respond in getting discs out while some tend to operate in a vacuum bubble taking their time...
Good luck and hope all are well.