If you could bring back one great artist that has

departed our world who would it be? We have lost some incredibly talented artists, often under tragic circumstances. If it were possible to have an encore I would vote for Janis Joplin. You?
Easy question> JERRY GARCIA. 
Picking one artist would be far too difficult. So, please pardon my short and very incomplete list:
Aretha Franklin
Otis Redding
Elvis Presley
John Denver
Buddy Holly
Michael Jackson
Richie Valens
Stevie Ray Vaughn
Waylon Jennings
Buddy Rich
Miles Davis
John Entwistle &
Keith Moon

Ricky Nelson, George Harrison, Elvis, Buddy Holly. 
... ONE OF THE GREATEST MALE VOICES (and a tremendously creative individual): NAT KING COLE