This next 2018 Rock & Roll Hall of Fame inductee strikes me as exactly the kind of artist for whom the Rock Hall was invented in the first place.
Sister Rosetta Tharpe was an influential electric guitar player/singer and one of the early pioneers of rock music, bridging from gospel into early R&B and serving as an inspiration for Little Richard, Elvis Presley, Jerry Lee Lewis and other acts who are often credited with the birth of rock-n-roll.