Bands I haven't seen that would like to (Assuming they still tour):
1: Foo Fighters
2: Tenacious D
3: Jack Johnson
4: Sublime w Rome
5: Nonpoint
6. The Wheeland Brothers
The list of bands and musicians I'd like to see is always changing, but I do have a list of must-visit North American venues.
1. Red Rocks (done, and I'd happily go back.)
2. Ryman Auditorium
3. Gorge Amphitheatere
4. Grand Ole Opry
5. Carnegie Hall
Well, since you listed my 5, I'll add in the Hollywood Bowl.