Norman Osborn (Sam Raimi movie series)
Norman eventually finds out Peter's secret identity, then attacks Peter's Aunt May and crush Mary-Jane Watson to try to bait him. Peter, as Spider-Man, manages to defeat the Goblin before Norman reveals himself. Despite finding out his best friend's dad is the Goblin, Peter refuses to work with Norman, who then tries to kill Peter but ends up killing himself instead. Harry then thinks Spider-Man killed his father, not knowing about the bad things Norman did as the Green Goblin until later in the movie series.