David Amram
Amram (b. 1930) is an American composer, conductor, multi-instrumentalist, and singer. He is particularly known for conducting jazz-themed ensembles. He plays piano, French horn pennywhistle, and Spanish guitar.
oral history: https://www.milkenarchive.org/artists/view/david-amram/
interview: http://www.bruceduffie.com/amram.html