hopefully FAR from unknown, but the father of the electric guitar. Charlie Christian. This in 1939 and the guitar was basically a rhythm instrument. this solo is perfect. I learned this note for note years ago.
And you cant forget Goodman for saying F segregation and brining in Charlie and Lionel Hampton, whihc excluded them from playing a lot of gigs. But when you had his stature, you can say screw the system and luckily for us he did.