If you could see any band live from any time period, that you haven't seen yet. Who would it be?

I've seen Metallica, Slayer, Megadeth, and Anthrax. I've been to a few Ozzfests and Cruefests. I'd have to say if i could see any band live that i've never seen it would be the original Guns N' Roses. Axl, Slash, Izzy, Duff, and Adler. Shame i never got the chance to see them play... :(