Neil Peart of Rush - just the mention of Rush zaps me back to being 14 and dateless, like most Rush fans at one point. He ranks up there with the best of all time, in spite of playing rock music, which for drummers is child's play compared to jazz.
Tori Amos was a child prodigy who was accepted by the peabody institute at age 5 and then kicked out by age 11 for only wanting to play rock music, making her the youngest to ever be expelled. While they have asked her to come back and perform, she has declined. "I'm still not over it."