Superman
The 1978 version of Superman managed to encapsulate a perfect combination of action, romance, and science fiction that took over two decades to match in another film. The closest cinema got to topping it was in 2002 with Spider-Man, and then again in 2005 with Batman Begins. Superman is a recipe for a near-perfect hero film.
Spider-Man
2002's Spider-Man starring Toby Maguire goes down in history for just about one scene only, and it's the one pictured above. The iconic upside-down Spider-Man kiss between a disguised Peter Parker and Mary-Jane Watson. This film laid out a blueprint for subsequent Spider-Man films that critics believe haven't been matched due to the success of this one.