As a survivor of the sixties and a pro player from the 70's, and not racist at all, Miles Davis' lineup for Bitches Brew is the most progressive and influential album from these art-rock times. Being influenced by Jimi Hendrix, Miles wanted to make a similar statement. He invited Herbie Hancock to play keys, only making him use a Fender Rhodes, an electric piano, for the first time. Herbie later found his own synth fame. Miles also had Chick Corea on keys, who went on to jazz-rock fame with Return to Forever. Just look at the other musicians who all went on to greater musical styles and fame after that musical eruption. John McClaughlin on guitar, for example.
If all you do is add up the various album sales and band poll wins, this album is it. What Jimi did with his own overdubs, and Stevie Winwood on keys, Miles created with live musicians. Electric Ladyland and Bitches Brew, what a two.