People who acted as Iron Man, who were not Tony Stark:
Weasel Willis, Mary Jane Watson, Ultron, Iron Lad, Pepper Potts, Norman Osborn, James Rhodes,
People who acted as Captain America who were not Steve Rogers:
Bucky Barnes, Danielle Cage, Sam Wilson, Misty Knight, John Walker, Peggy Carter,
I feel like that’s good enough. You think you got me with 007, but that’s based off of novels and not comics/sci-fi. And either way, clearly you’re ignorant to how fictional media functions, specifically relating to comic super-heroes.