Anastas Ivanovich Mikoyan (Russian: Анаста́с Ива́нович Микоя́н; Armenian: Անաստաս Հովհաննեսի Միկոյան Anastas Hovhannesi Mikoyan; English pronunciation: /miːkoʊˈjɑːn/; 25 November [O.S. 13 November] 1895 – 21 October 1978) was an Old Bolshevik and Soviet statesman during the mandates of Vladimir Lenin, Joseph Stalin, Nikita Khrushchev, and Leonid Brezhnev. He was the only Soviet politician who managed to remain at the highest levels of power within the Communist Party of the Soviet Union, as that power oscillated between the Central Committee and the Politburo, from the latter days of Lenin's rule, throughout the eras of Stalin and Khrushchev, until his peaceful retirement after the first months of Brezhnev's rule.
More information on the English and Russian Wikipedia pages. His namesake and grandson, also known as Stas Namin, has a Wikipedia page here.