Quinn the Eskimo, Dylan's pied piper of the North:
Some furthur examples from McCloud's Blotter Barn site, where you can order prints in varying sizes (sans lysergic acid diethylamide, of course):
Check out the prints and prices here.
Like it or not, this is really a snapshot of one of the most controversial aspects of a hugely important counterculture and the art it inspired. I'm really quite taken with some of these prints and the detail that goes into their production.