If K-BAT brought someone in for a concert, who would you want?

If you could have someone in for a concert, who would you want (within reason)?

Led Zeppelin, Metallica...Van Halen, Pearl Jam...don't count!).  Who would be in your top 3?  Newer acts, I'd say Greta Van Fleet, Volbeat, Theory of a Deadman.  More "Classic", I'd say?  Def Leppard.