Well since I'm first I'll throw out a few obvious ones, CCR, Jefferson Airplane, Janis Joplin, The Who, The Beatles, Jimmy Hendrix.
Pink Floyd, Moody Blues, Jimi Hendrix, Led Zeppelin, Donovan, the Who, Led Zeppelin, Jefferson Airplane, Yes, Rush, the Beatles, the Doors, Jethro Tull
Thare are a few CSN(+Y) - CCR - Jimi, Janis, Joni - Donovan - Floyd, a bit of Led, BeaTles and Stones, Allman Brothers, Jeff Airplane along with ........ It's a bit of a long list
Little Feat, Savoy Brown, Deep Purple, of course the Greatful Dead, Derick and the Dominoes, Bob Dylan, The Yardbirds, Cream, Traffic, The Animals, and the new hippie sensation...Umphrey's McGee. They're like the new Greatful Dead.
https://www.youtube.com/watch?v=qV3FuDUHk-c&feature=related"]Captain Beefheart & His Magic Band "Tarotplane" - YouTube