casahistoria is recommended by many sites including:
(Extracts from N Pereira's article in History Today Vol. 42, August 1992)
for more detailed lists try:
Nikolay Ivanovich Bukharin (1888-1938)
Bukharin was a communist leader and a member of the Politburo from 1924-9. During the struggle for control of the party, he allied himself with Joseph Stalin against Leon Trotsky, Zinovyev and Kamenev. In 1929, having fallen out of favour with Stalin, he was stripped of all his positions. Arrested on charges of Trotskyist activities in 1937, he was convicted during one of the Stalin purge trials, and executed.
Vladimir Ilyich Ulyanov, known as Lenin, was the leader of the Bolshevik Party and the founder of the Communist State in Russia. He spent much of his life in exile, only returning to Russia following the February Revolution. He immediately set about working for the overthrow of the Provisional Government and was the motivating force behind the October Revolution when the Bolsheviks seized power. He ruled Russia until his death in 1924.
Leon Trotsky (1879-1940)
Originally named Lev Davidovich Bronstein, Trotsky was born on November 7, 1879, in Kherson Province in Ukraine. He was exiled for his Marxist activities in 1897, but escaped abroad in 1902. Following the February Revolution he returned to Russia, and joined the Bolshevik Party in July. An outstanding orator and organiser, he was the man who prepared and carried out the October Revolution. In Sovnarkom, the new Soviet government Trotsky first became commissar of foreign affairs, negotiating a separate peace with Germany at Brest-Litovsk. Later, as a ruthlessly practical commissar of war, he is credited with creating, inspiring, and directing the Red Army that gained a great victory in the civil war and saved the Revolution. Following Lenin's death he was outmanoeuvred by Stalin, and in 1929 was exiled from Russia. He was assassinated by a Stalinist agent in 1940 in Mexico.
Stalin is one of the dominating personalities of the twentieth century. Born
Iosif Vissarionovich Dzugashvili in Georgia in 1879 to a peasant family, he
attended a church school from 1888-94, winning a scholarship to Tbilisi
Theological Seminary where he began training to be a priest. Here he began
reading forbidden literature such as Marx's Das Capital, and left before
graduating to become a full time socialist revolutionary.