Who was the leader of the Russian Communist Revolution?

Russia was communist for 70 years. It had more than one leader. From 1917 to 1989, they were: Vladimir Lenin, Josef Stalin, Nikita Khruschev, Leonid Brezhnev, Yuriy Andropov, Konstantin Chernenko & Mikhail Gorbachev. The bloodiest was Josef Stalin. He murdered twice as many people as Hitler.