Gwen Stacy
In the landmark story "The Night Gwen Stacy Died" ("The Amazing Spider-Man" #121-122), the Green Goblin kills Gwen Stacy and later dies in a fight against Spider-Man. However, the story's writer, Gerry Conway, had Harry Osborn adopt the Green Goblin identity in the aftermath of "The Night Gwen Stacy Died", later remarking that "I never had any intention of getting rid of the Green Goblin as a concept". Harry Osborn's becoming the Green Goblin was mostly well received, with fans remarking that Harry was more menacing than his father had ever been. Writer Roger Stern later introduced the Hobgoblin to replace the Green Goblin as Spider-Man's archenemy.