For some reason this one has always stuck in my mind as a "classic" or immortal image. It isn't just the skin. I think it's the starkness and absolute quality about it, the distilling of the James Bond fantasy down to its most basic and primitive psychological components:
My favorite album cover is the Hipgnosis-designed "Parachute" by the Pretty Things. It is also my favorite rock album of all time -- and I would propose, favorite of mine or not, it is one of the great rock albums, period.