Characters that are better off dead.

Kraven the hunter because he had the most open and shut dramatic death ever only to be brought back because he was iconic only for people to remember “ oh wait spider-man has more interesting rogues and we don’t really need this guy.” So they killed him off again and now whenever they need a Kraven they just use his clone son. Who’s Kraven but without any of the pathos and just exists to show up and get his ass kicked.