Suggestions by @stegg

Cameron Monaghan

as Carnage in Avengers Recasted

John C. McGinley

as J Jonah Jameson in Avengers Recasted

Timothée Chalamet

as Peter Parker in Avengers Recasted

Miles Brown

as Miles Morales in Avengers Recasted

Keanu Reeves

as Tony Stark in Avengers Recasted

Tom Cruise

as Tony Stark in Avengers Recasted

Jack Black

as Doctor Octopus in Characters who have not appeared, but should appear, in the MCU

Megan Thee Stallion

as She-hulk in New avengers

Miles Brown

as Miles morales in New avengers

Marcus Scribner

as Harry Osborn in Spider-Man's Rogues Gallery

Pete Davidson

as Morbius, the Living Vampire in Spider-Man's Rogues Gallery

Steven Ogg

as Vulture in Spider-Man's Rogues Gallery

Matthew Perry

as The Lizard in Spider-Man's Rogues Gallery

Giovanni Ribisi

as Electro in Spider-Man's Rogues Gallery