Suggestions by @comodin

Benedict Cumberbatch

as Joseph Stalin in The King's Man: The Traitor King

Sophie Marceau

as Pepper Potts in Iron Man 3 (1993)

Willem Dafoe

as Green Goblin III in Marvel Variants

Michael Cudlitz

as Smasher in Nemesis Brothers

Emma Watson

as Elizabeth Windsor in The King's Man: The Traitor King

Timothy Spall

as Winston Churchill in The King's Man: The Traitor King

Chris Evans

as Walking Supernova in Nemesis Brothers

Sigourney Weaver

as Jane Van Dyne in Ant-Man (2005)

Lena Headey

as Haldir in Genderbent Lord of The Rings (Lady of the Rings, I guess?)

Adrien Brody

as Edward Windsor in The King's Man: The Traitor King

Kate Mara

as Vanishing Lady in Nemesis Brothers

Sean Bean

as Annihilus in Nemesis Brothers

Matthew McConaughey

as Green Goblin in Marvel Variants

Tom Holland

as Green Goblin II in Marvel Variants

Elizabeth Olsen

as Crimison Empress in Nemesis Brothers

Danny DeVito

as Mole Man in Nemesis Brothers

Wagner Moura

as Werner von Doom in Nemesis Brothers

Brendan Fraser

as Ben Grimm in Nemesis Brothers

Kristanna Loken

as Rescue Collins in Nemesis Brothers

James Arnold Taylor

as Incendiary in Nemesis Brothers