https://en.wikipedia.org/wiki/Lazar_Kaganovich

Born in Ukraine, first Secretary of the Communist Party of Ukraine.

https://en.wikipedia.org/wiki/Leonid_Brezhnev

Born on current Ukraine territory (unless you wish to argue that it should belong to Russia).

https://en.wikipedia.org/wiki/Leonid_Brezhnev#Early_life_and...

"Brezhnev's ethnicity was given as Ukrainian in some documents, including his passport, and Russian in others."