He was the soloist at the premiere of that work, which was preceded on the program by Glazunov's 5th symphony, chosen for the Charleston rhythm featured in his Concerto in F.  He bought four taxi horns for a work inspired by a trip to Europe, and the rhythms of a train ride in Boston inspired another piece that opens with a clarinet glissando.  
This man's last painting was a portrait of his neighbor and tennis partner, Arnold Schoenberg.  He bought a copy of Forsyth's Orchestration for use in working on a commission from Damrosch.  He was the soloist at the premiere of that work, which was preceded on the program by Glazunov's 5th symphony, chosen for the Charleston rhythm featured in his Concerto in F.  He bought four taxi horns for a work inspired by a trip to Europe, and the rhythms of a train ride in Boston inspired another piece that opens with a clarinet glissando.  FTP, name this composer of An American in Paris and Rhapsody in Blue.
This man's last painting was a portrait of his neighbor and tennis partner, Arnold Schoenberg.  
George Gershwin or Jacob Gershovitz