In no particular order - but those in the first section would be MUSTS when they invent the way back machine:
grateful dead, jimi, janis, jefferson airplane (with Grace, though current JS:TNG with Diana and Darby before her are bloody good), doors, zappa, love (with bryan), pink floyd (with syd), beatles
Also rans:
Quicksilver Messenger Service, Kaleidoscope (both the UK and US groups), kinks, eric burdon & the new animals, Buffalo Springfield, The Jam, XTC, Fairport Convention (with Sandy Denny), phish, the who, small faces (though saw Steve Marriott solo many times), gong (with steve hillage on board), led zeppelin, rainbow (with Dio) etc etc
OK, so it\'s a very psychedelia based list, with a few exceptions, but...
Also am not adding the breakfast, cause one of these days....