The other day I came across a photo of Melinda Marx (Groucho's daughter) doing a dance step with Ann Margret. Melinda was an extra in Bye, Bye Birdie.
Man of Bronze, Man of Iron, Man of Steel.
Okay, maybe I'm cheating a bit with the second one. It's not actually a comic cover, though I think it would make a great one. It's a poster for a 1981 Polish film "Człowiek z żelaza" ("Man of Iron") about the Solidarity trades union. The alternative, using a cover showing Tony Stark would also be cheating, as he's "Iron Man", not "Man of Iron"