If we're jumping in the way-back machine...let's bring back...
Little Oral Annie (master of blowjobs before they became popular)
Candy Samples (one of the original big breasts)
Seka (the original swedish erotica)
John Holmes (imo, Peter North Sr.)
Nina Hartley (nuff said...don't know if she retired or not though)
Nina is still making movies and is one hot mature woman.