4. Grim Reaper - Episode: "Treehouse of Horror XIV (Reaper Madness)"
When Death, in the form of the Grip Reaper comes after Bart in an attempt to sentence him to an eternity of pain for all his misdeeds, Homer kills it with a bowling ball. He then realises however that now, no one can die, as a depressed Moe finds out when he attempts to hang himself. When Homer takes the corpse of the Grim Reaper outside for trash collection day, he tries on its cloak, and inadvertently becomes the new Grim Reaper, tasked with killing people on God's List.
D'oh! How It Goes Wrong Homer enjoys the perks of being death personified, particularly when he uses his powers at a baseball game to score good seats by killing the occupants with a single touch. However, he is later required by "God's List" to kill Marge, and he refuses, drawing the ire from the Big Man upstairs, who attempts to smite Homer. Homer escapes on a motorcycle.