best to break braxton down by decade, as a multi instrumentalist and taste makes, his style changed a lot through his career, while always remaining avant garde to the bone:
60's:
three composition for new jazz
for alto
70s:
circle
aris concert
in the tradition volumes 1 and 2
five pieces
for four orchestras
80's:
for two pianos
composition no 96
six duets
compositions no 113
six monk's compositions
eugene
90s:
charlie parker project
9 standards
knitting factory volume 2
silence/time zones
i mean, i obviously havnt heard all his stuff, his catalog is immense, even in for a free jazz artist. hes genius, but honestly im not a huge fan. you might like it though, especially if youre into really experimental music. some of his shit isnt really jazz, in fact if even be hard pressed to call him a jazz musician. anyways, just a brilliant avant garde composer, and check out whatever you can find.