I've heard his "Suite for Violin and Piano" (at a Juilliard violinist's senior recital, exciting) but no recordings. I've been aware of him as "the dean of African-American composers" -- he: studied, played with and arranged for W.C. Handy (1916-21) and then studied with Varese (1923) premier of his Symphony in G was conducted by Leopold Stokowski in 1937 (off-the-wall segue: I just recently saw that Bugs Bunny cartoon where he flings his ears back and stalks to the podium, with the audience murmuring "Leopold! Leopold!") did a lot of scoring/composing/orchestrating for radio, films (Stormy Weather, Pennies From Heaven, Lost Horizons) and TV (Perry Mason, Gunsmoke)
He also wrote theme music for the 1939 World's Fair (where this picture of Still and Handy is from):
BUT
From: http://scriptorium.lib.duke.edu/sgo/start.html