A couple more...

#Lonnie Johnson and Eddie Lang: Amongst the earliest pioneers in modern jazz, and the fathers of the modern guitar solo

#Procol Harum: Possibly the first band to incorporate classical and jazz influences into psychedelic rock, thus paving the way for prog rock.

#The Mahavishnu Orchestra: With an incredibly broad range of influences and impeccable musical skill, took fusion to a new level

#Santana: Made jazz-rock much groovier and (let's face it) more recognisably musical :p Also gave us one of the most creative guitarists of the century - who, after three brilliant albums, sold his soul to the record companies :(

#Stevie Ray Vaughan, Robert Cray, Robben Ford etc: Helped to popularise electric blues and roots in the eighties with their new, rock- and pop-influenced styles

#The Sex Pistols, the Clash, the Buzzcocks etc: For better or for worse, gave us punk

#Carcass, Death, Slayer: For better AND for worse, gave us death metal.

#Korn, Slipknot, Machine Head etc: Definitely for worse, gave us nu-metal

#Stevie Wonder: One of the fathers of modern RnB