Simon Williams

A failing industrialist manipulated by Baron Zemo and the Masters of Evil, Simon Williams underwent an experimental ionic energy treatment that transformed his body into living energy, granting him extraordinary strength and near-invulnerability — but left him dependent on Zemo's technology, compelling him toward villainy before he ultimately chose heroism as Wonder Man.

Few characters can claim a Silver Age debut and still be making waves more than six decades later, but Simon Williams has done exactly that — first stepping onto the page in The Avengers #9 in 1964, courtesy of Stan Lee and Don Heck, and racking up an extraordinary 611 catalog appearances since. A fixture across The Avengers, Avengers, and West Coast Avengers, he's spent his comics life in genuinely elite company, sharing adventures with Iron Man, Captain America, Thor, and the alter egos behind those legendary names. With 28 key-issue appearances to his name, Simon Williams is the kind of character that serious collectors keep circling back to — a Marvel original whose longevity speaks for itself.