This composer was contracted to write a score for 2001 at MGM's insistence, only to see it discarded by Stanley Kubrick. This composer was nominated for 15 competitive Oscars, but never won, and was later the first composer to be given an honorary Oscar for lifetime achievement. Identify this composer of such films as A Streetcar Named Desire, Viva Zapata!, Unchained (including "Unchained Melody"), Cleopatra, Spartacus, The Agony and the Ecstasy, and Shoes of the Fisherman (which incorporated some of the lost 2001 score).
Alex North