Clay Quartermain

Born into the thick of Marvel's Silver Age espionage craze, Clay Quartermain made his debut in Strange Tales #163 back in 1967 — courtesy of Jim Lawrence and Dan Adkins — and has been a reliable presence in the Marvel Universe ever since. A proud S.H.I.E.L.D. operative through and through, he's spent nearly six decades rubbing shoulders with the absolute heavyweights of the spy and superhero worlds: Nick Fury, Dum Dum Dugan, Bruce Banner, the Hulk, and Steve Rogers himself. His strongest footprint runs through The Incredible Hulk, Nick Fury, Agent of S.H.I.E.L.D., and Nick Fury's Howling Commandos, making him one of the organization's most enduring field fixtures. With 89 catalog appearances spanning 1967 to 2025 and five collector-recognized key issues to his name, Quartermain is exactly the kind of deep-cut Marvel stalwart that rewards fans who look past the headliners — a career agent whose longevity speaks for itself.