Off the top of my head:
Classical - Wagner, Bruckner, Tchaikovsky, Glass, Reich
Rock - Bowie, Mott the Hoople, Lou Reed, Marillion, Pulp, Genesis (until Gabriel left), Peter Gabriel, Moody Blues, Roxy Music, Snow Patrol, Muse, Dexy's, Steve Harley/Cockney Rebel, Tangerine Dream, The Clash...