The Answer: MILES DAVIS. In the last decade of his life (1980 till his death in 1991) he devoted himself to painting.
There is an exhibition/sale of this work at the Exchange Court Gallery, Maiden Lane, Covent Garden, London, WC2 OJU, running for just one week, from Monday 1st until Saturday 6th June from 11.30am – 6.00pm
The Vortex website has a good piece about it
The show will also travel to the Static Gallery in Liverpool
A similar exhibition in 2005 got serious coverage from Sholto Byrnes in the Independent
The official Miles Davis site also has good material.