My fiance should be answering this, not me, but since he's not a Greek...
I only saw one in 1995.
Uncle John's Band
not well-versed enough to answer these three!
Phil Lesh
We saw Phil Lesh with Willie Nelson in HersheyPark in 2001. It started to pour during the intermission when suddenly one of the rides from HersheyPark made a loud train horn sound. Someone yelled, "Casey Jones!"
Guess what led the encore?