In which film is Tony Stark a character?

Who played Bane in 'The Dark Knight Rises'? Who played Arthur Fleck in 'Joker'? Who played Bruce Wayne in 'Batman Begins'? In which film is Bruce Wayne a character? Who played Steve Rogers in 'Captain America: The First Avenger'? In which film is Steve Rogers a character? Who played Loki in 'Thor'? In which film is Loki a character?