26. Tom Morello
In the early days of Rage Against the Machine, Morello watched local California metal guitarists play "as fast as Yngwie Malmsteen" and realized, "That wasn't a race I wanted to run." So he began to experiment with the toggle switch on his guitar to produce an effect like a DJ scratching a record. The result was true rap metal and a redefinition of the guitar's potential. Morello absorbs hip-hop mixology as a true son of Grandmaster Flash and the Voodoo Child, making his riffs rumble and boom like crosstown turntable traffic.