John Lennon called him his "soul mate." George Harrison called him the band’s "art director." He's the reason Paul McCartney switched to bass guitar. He had the fashion sense and the stage presence. He even invented the band's iconic "mushroom head" hairdo. As Ted Widmer writes in a lengthy piece for the New Yorker, original Beatles member Stuart Sutcliffe "remains a spectral presence in Beatles lore"—so much so that he appears in the eclectic crowd on the Sgt. Pepper's cover. Widmer examines Sutcliffe’s heavy influence in the band’s earliest days and leaves the impression that, without him, the Beatles never really would have been. (Incidentally, the band’s name was a joint creation between Sutcliffe and Lennon.)
Source: Mike L. Ford/newser.com