I want Live-Evil so bad. I have a 3 minute clip of Sivad and it's fucking amazing.

just put it on myself :) the blackwell solo on cherryco never gets old

I was lucky enough that they have a copy in my university library!
It's definitely my favourite fusion Miles album, funkier and heavier than most other stuff. McLaughlin is amazing on that album.

live evil rules. a lot of people are surprised when i declare my love of 70s miles, but i think all those records, bitches brew, on the corner, and especially live evil, are phenomenal pieces of music.

If you're into Live/Evil then I can't stress enough how much you need to get your hands on The Cellar Door Sessions 1970. Trust me, it's worth it. Six CDs and a lovely 100 page or so booklet, containing the full recordings of the band’s Cellar Door residency, from which all of the "Live" side of Live/Evil was taken. Arguably one of the very best Miles sets. I’ve listened to the various takes of “What I say” on that just a crazy number of times.

Eric Dolphy - Out to Lunch
Charles Mingus - Town Hall Concert (1964)
Albert Ayler - In Greenwich Village
Thelonious Monk with John Coltrane at Carnegie Hall
John Coltrane - Blue Train
John Coltrane - Concert for Olatunji
Don Cherry - Eternal Rhythm
Art Ensemble of Chicago - Bap-Tizum
Dollar Brand - Anatomy of a South African Village
Sun Ra - Magic City

Charles Mingus - Revenge!
Ellington/Mingus/Roach - Money Jungle
Last Exit - Iron Path
Charles Mingus - Presents Charles Mingus
Alice Coltrane - Ptah, the El Daoud
The Grassy Knoll - III
Miles Davis - Filles de Kilimanjaro
John Coltrane - Live at the Half Note: One Up, One Down
Sex Mob - Sex Mob Does Bond
Charlie Hunter Trio - Bing, Bing, Bing!

you got my top 2!

also

john coltrane-a love supreme
herbie hancock-empyrean isles
don cherry-symphony for improvisers
sam rivers-fuschia swing song
billy hart-enchance

can't think of any others that are too definite

I have to throw out the "have to own" qualifier since I own some albums that aren't necessarily my favorites, and I have some favorites that I don't necessarily own.

Sun Ra - Atlantis (though it's extremely hard to pick just one album of his, if I didn't he'd fill half of my top ten!)
Miles Davis - Sketches of Spain (the same as above confounded by the fact he is actually essentially a different person at different points in his career!)
Ornette Coleman - The Shape of Jazz to Come
John Coltrane - Om (though it's such a huge commitment to listen to that I only ever rarely do so)
Alice Coltrane - Lord of Lords
Art Ensemble of Chicago - A Jackson in Your House
Ken Nordine - Word Jazz
Thelonious Monk - Straight No Chaser
Herbie Hancock - Head Hunters
Albert Ayler - Spirtitual Unity