Stu Sutcliffe; the other fifth Beatle. Just read up on him. The dude walked away from the Beatles, and wasn't kicked out like Pete Best, dude also originated the bowl cut and even lent McCartney his first bass. Dude stayed on until they made it big as a club act in Hamburg after Liverpool then split to go to art school and died a year later.
His art had been commended as being strongly vaginal, which bothered German nihilists cats like Klaus Vormann, but Stu said, "Take it easy, man.", and Klaus did, later doing the cover art for "Revolver".
Stu is a Dude, no doubt. He was the "Beatle Dude".