He is on more than 100 albums. For me Crescent and Sun Ship would probably rank in the top 10. Do you do guys know these two albums? Also his work with Monk is interesting.
A Love Supreme would be in my top 10 as well. At some point it gets so intense and still very musical, not too frantic for my taste as in some of his later work. That bass work by Garrison! Pretty cool.
Some nice stuff in the fifties as well e.g. with Mal Waldron, Tadd Dameron, Wilbur Harden or Paul Chambers, to name some.
From his own Prestige albums I rate Coltrane, Lush Life, Dakar and Bahia the highest, I think.
His 1961-1965 live albums are all musthaves imo.
The albums that he (co-)led that I haven't heard yet:
Studio:
The Avant Garde (co-leader Don Cherry). Recorded in 1960.
Cosmic Music. Recorded in 1966 and 1968.
Stellar Regions. Recorded in 1967.
Expression. Recorded in 1967.
Live:
1966-05-28
Live at the Village Vanguard Again! Pharoah Sanders, Alice Coltrane, Jimmy Garrison, Rashied Ali, Emanuel Rahim
1966-07-11, 1966-07-22
Live in Japan Alice Coltrane, Pharoah Sanders, Jimmy Garrison, Rashied Ali
1966-07-22
Concert in Japan Alice Coltrane, Pharoah Sanders, Jimmy Garrison, Rashied Ali
1966-11-11
Offering: Live at Temple University Alice Coltrane, Pharoah Sanders, Sonny Johnson, Rashied Ali
1967-04-23
The Olatunji Concert: The Last Live Recording Alice Coltrane, Pharoah Sanders, Jimmy Garrison, Rashied Ali
And a couple of Pablo Records live albums.