Some off the top of my head not listed:

Jimi Hendrix/Miles Davis/Clarence Clemons/Billy Preston/Michael Jackson/Tina Turner/Lionel Ritchie/Rick James/Muddy Waters/Buddy Miles/Al Jarreau/Anita Baker/Diana Ross: any Motown artist/Robert Cray/Stanley Jordan/Billy Cobham/Bo Diddley/Sade/Bob Marley/Sammy Davis Jr./Jay Z/The Mills Brothers/Alicia Keys/Whitney and Thelma Houston/etc.

FWIW: The list is endless