If I was to make a top 10 of people who represent the RANGE sounds of the 20th century and not ALL necessarily TRUE innovators but still great
Miles Davis (5+ decades of jazz....played a role in bebop and harbop and the main pioneer in Cool jazz, modal, jazz fusion. Even did some hiphop type jazz)
George Clinton (a wider range of Funk sounds than james brown)
2pac ( most globalized HipHop star)
Marley (popularized reggae to the world)
Aretha (queen of Soul)
Stevie Wonder (the total package of singer-songwriter)
T-Bone Walker or Charlie Christian (the true fathers of electric blues and then its later offshoot into rock n roll/blues rock/etc... from a guitarist POV)
Hendrix (changed the sound of the guitar and musical palette of ALL modern pop)
Chick Webb (the TRUE first modern drumming/drum kit king)
Quincy Jones (did it all from jazz, pop, R&B, movies scores and hiphop)