I'd probably do an evolution of blues/ rock concert over two days.
For the blues day I would have Charlie Patton, Robert Johnson, Elmore James, Son House, John Lee Hooker, Muddy Waters, BB King, Buddy Guy, T Bone Walker, Freddie King ,Albert King, Otis Rush, Junior Kimbrough, Gary Clark Jr. and Christone Kingfish Ingram.
My rock day would be rock artists with those blues players making an appearance as they cover their songs or songs that influenced them. I'd have Zep, Floyd, Clapton (with Cream and Blind Faith), Allman Brothers, Fleetwood Mac, Stones, Beatles, Aerosmith, Eagles, Prince, Red Hot Chili Peppers, Foo Fighters, Jack White, Stapleton, and Black Keys.