Anything by Charles Mingus.  I have the `Complete Recordings 1957 - 1960' collection on my iPhone and it's amazing, it has all of these on it; Word from Bird (with Teddy Charles) The Clown Mingus Three (aka Trio) East Coasting A Modern Jazz Symposium of Music and Poetry Mingus Ah Um Wonderland The Weary Blues (with Langston Hughes) Blues & Roots