Larry Graham (invented slap bass)
Aphex Twin
Mad that the first ten years or so of hip hop went unrecorded, so we'll never really hear how that evolved.
I read in Smash Hits when i was a child Cliff Richard claiming to have invented rock n roll. He clarified he meant in the UK. Then further clarified he meant he was the first to dress a certain way, with "puce socks". Still not sure what puce is. Anyway. Not Cliff. Lonnie Donegan, no Lonnie, no 60s.