Peter Gabriel - Progressive rock, experimental rock, pop rock, art rock, world music
Phil Collins - Progressive rock, rock, pop, jazz fusion, R&B
Peter Cetera - Rock, adult contemporary
Brian McKnight - R&B, soul,quiet storm
Billy Joel - Rock, pop, jazz, classical
Chaka Khan - R&B, jazz, soul, funk, disco, adult contemporary
Marvin Gaye - R&B, soul, doo-wop, funk, quiet storm
James Blunt - Pop rock, soft rock, folk rock
James Ingram - Soul, R&B, crossover jazz
Luther Vandross - R&B, soul, soft rock
Men at Work - Rock, new wave, pop rock
Michael Bolton - Pop rock, soft rock, hard rock, blue-eyed soul
Michael Jackson - R&B, pop, rock, soul, dance, funk, disco, New Jack swing
Prince and the Revolution - Rock, pop rock, funk
Ray Charles - R&B, soul, blues, rock and roll, jazz, country, pop, gospel
Dave Koz - Smooth jazz
Boney James - Jazz
Seal - Soul, R&B, adult contemporary, soft rock, pop
Sting - Rock, pop, new wave, jazz, new age, blue-eyed soul
Stephan Bishop - Rock, blues rock, pop rock
Steve Perry - Hard rock, pop rock, pop
Whitney Huston - Pop, R&B, dance, soul, gospel
Source: Wikipedia (take with a grain of salt)