1. Sex Pistols at the Trump Borgata in AC 2003, 2nd place Pistols at the 9:30 Club in DC same tour.
2. Journey opening for the Stones at Rich Stadium 1981. If you need a headliner, then Yes in the round at Purdue 1979 (don't kill the whale )
3. No one right now that I can think of, I think I've seen everyone I wanted to see that's still going. Maybe Nick Cave and the Bad Seeds, not a big fan of the music but the shows look incredible from vids.
4. Led Zeppelin, had tickets 2x for shows that never happened (Plant's kid and Bonzo)