Sharp began his career in the 1960s as a contributor and art director for Oz, a revolutionary satirical magazine run by Richard Neville. He designed album covers and concert posters for the likes of Jimi Hendrix, Donovan and Bob Dylan, and co-wrote the lyrics to Cream's "Tales Of Brave Ulysses."

''He was a fully-charged non-stop rocket in his younger years but it always continued on,'' Neville said, adding that Sharp was "an outsider but also an insider ... At core he was an artist beyond repute in my opinion, but not an artist necessarily certified by the academy."