Galactus is a destructive force in The Fantastic Four: First Steps, but the Sacred Timeline has characters who could potentially beat him.
The film features a version of Galactus, played by Ralph Ineson, that is faithful to his comic book origins. He is a being of immense cosmic power, born before the universe, with a relentless hunger that drives him to destroy inhabited worlds.
The Devourer of Worlds is not merely a villain to be punched, and the movie captures the scale of this threat.
Author's summary: Galactus is a powerful threat.