Question

Avant-garde bassist, he was highly regarded as a virtuoso performer, composer, and band leader; he led an experimental workshop in New York City; his modernist leanings were tempered by his tendency to swing hard:

Answer 1

Charles Mingus!

Step-by-step explanation:

Charles Mingus was an amazing composer, and he wrote a lot of great tunes like Fables of "Faubus" and "Moanin'".