Saladin
The ruler of the Fatimid Caliphate of Egypt made him Vizier, meaning prime minister, even though he was not a Shia. Just before the Caliph died, Saladin was crowned Sultan of Egypt and Syria. His greatest victory was at the Horns of Hattin in July 1187 AD, after which Jerusalem fell to the Muslim army (October 1187) and was never again recovered by the Crusaders. He is also remembered for his series of battles and wins and losses against King Richard I of England. These were inconclusive and in the end resulted in a moral victory for Sultan Salah ad-Din, when Richard's Crusade failed and returned to Europe.