First off, GREAT call on Dr. Dog by the OP. Saw them for the second time a month ago and it was unreal good.
These are the best live bands I've ever seen in person:
1. My Morning Jacket - IMO hands down the best live rock act you can see right now. They not only put on an amazing performance, but they play FOREVER. You can really tell these guys love playing for a crowd. They are THE ACT to see at Bonnaroo every year now.
2. Radiohead - What more can you say? Arguably the biggest band on the planet. Their stage set up is fantastic. Their live chops are unbelievable. If you want to feel like you've gotten your money's worth, this is the band to see. They never disappoint.
3. The Avett Brothers - this might be the 21 year old college girl in me (I'm actually a 27 year old dude) but these guys put on a hell of a live show. They leave everything out on the stage ever single show. They write sappy songs but they also have great harmonies and have crafted a unique sound over the years. They are definitely worth the price of admission. Drink a few whiskey drinks before the show and find a nice coed to dance with.
Bands I would love to see live:
Pink Floyd - I got to see them via the interwebs for live 8, but wasn't the same. We will never get to see them reunite in their original lineup (minus Syd Barrett) since Richard Wright's passing.
Daft Punk - say what you will about their music, I've heard their live shows blow other electronic acts completely away.
U2 - Not a huge fan of their music but they do put on a great show.
The Boss - Once again, not a huge fan of his music, but his performances are legendary.
Rage Against the Machine - Rally round your family....you know the rest.