The answer you are looking for is AYATOLLAH RUHOLLAH KHOMEINI. However, this is technically incorrect. Khomeini did not overthrow the Shah himself, but eventually claimed power in the wake of his abdication.
Shah Mohammed Reza Pahlavi abdicated the throne on January 16, 1979 and control of the government fell to his Prime Minister Shahpour Bakhtiar. Ruhollah Khomeini would not even arrive in Iran until February of 1979. Bakhtiar continued to rule until February 11, 1979. Iran was then ruled by an interim government headed by Mehdi Bazargan as Prime Minister and featuring a number of opposition groups who came together with the intent to write a new constitution. However, Barzagan resigned on November 6, 1979 in protest of the attack on the US Embassy (which he believed were brutish actions unbefitting of Iranians). With Bazargan's resignation, the Islamists led by Ruhollah Khomeini swept into power and began to rule the country.
Batista was the leader of the cold war
The President of the U.S. during The Cold War was Truman.
He was the Soviet Unions leader during the Cold- War
Mao Zedong
Mao Zedong
My dad , HITLER !
Joseph Stalin
Khrushchev
chaing kai-shek
Mao Zedong
BoB Mcclain
Leonid Brezhnev had the longest tenure (18 years) as the Soviet leder during the Cold War.