Marvel villains are notorious for racking up the on-screen body count, but even heroes like the Avengers have killed characters in the MCU. One-on-one showdowns between hero and villain are fertile ground for death and destruction, and when the Avengers assemble to collectively combat large-scale threats to the universe, the number of causalities in the good-guy corner really begins to add up. All matter of alien and human life from the mindless Outriders to cunning Hydra agents have met their maker at the hands of Nick Fury’s MCU heroes, but only one can claim the title of deadliest Avenger.