Tai Chen

Tai Chen made their Marvel debut in The Avengers #32 back in 1966, stepping onto the Silver Age stage in one of the most storied titles in comics history — and doing so in the company of legends like Goliath, Hank Pym, Janet Van Dyne, and Clint Barton. A card-carrying Avenger whose history stretches an impressive five-plus decades from that Stan Lee and Don Heck debut all the way to 2019, Tai Chen may have a compact catalog presence but punches above their weight with two collector-recognized key issues among just five appearances. For fans who love hunting down the corners of Marvel's Silver Age tapestry, this is exactly the kind of hidden gem worth tracking down.