The first savior of this world was a martial arts master, and he lead an army of magic-less humans in a historic fight for equality against the dominant ruling class during the War of the First Millenium, and his legends are still sung till this day.
The second savior was a military genius with access to his mysterious 'System', and he defeated Khan, the Eternal General, stopping his genocidal conquest across the continents and preserving the various races, countries, and cultures of the world.
The third savior traversed through the land of the devils and brought one along with him. When the gate to the Underworld was opened, he alone lead the world's forces against the onslaught of demonic forces.