John Paul Jones was in the navy.
Friend: "Like, the bassist from Led Zeppelin?"
Me: "No, the Scottish sex god of naval warfare."
Friend: "Oh yeah, what a total badass."
Can be used to refer to any highly-talented individual who is forgotten among legendary peers.
"Jimmy Page, Robert Plant, John Bonham...fuck, I forgot the other guy..."
Earle Combs played next to Ruth and Gehrig for the Yankees of the '20s and '30s. He hit .325 in his career yet is forgotten by all but the most dedicated fans; he was the John Paul Jones of the team.