The Four Horsemen of the Apocalypse(or shortened to "The Four Horsemen" for shorter), isnt just one character, but four different entities in one group, consisting of Death, Famine, Wat and Conquest. Death being the weakest(compared to the others), Famine the third(being almost the same as Death, but with much more impact on humanity), War(due to how strong he is and the impact he had on humanity´s history), then Conquest. The strongest of the fourth.