Just to clarify, it does not say one of the "best actors of his generation" it says most prolific, ie works a lot, is in bloody everything.
Would not say that of Mr "Gets a prize of something heavy."
Prolific would be:
Mr "Smooths the creases out of clothes with a hot metal implement."
or
Mr H "what students used to get to live on" - except he's not married or a father is he?
or
Mr "Cooks something in a pan with oil" - but he doesn't qualify either
But they are all what I'd call "prolific." Diamond Geezer isn't.
Mr "Large commercial vehicle used to transport goods" would sort of fit as he has done comedy, novel writing, hollywood movies, TV drama, blues album etc. Although I'd call that "versatile" rather than "prolific."