Honestly it's hard seeing Shcherbakov survive beyond 1950,given his obesity and how much of a drunk he was. Same with Zhdanov-his alcoholism is a big reason for his health problems.I'm finding this counterpart (from the same scenario) a bit trickier, I may need to consult someone like @The Red.
List of Soviet paramount leaders (actual titular offices held will vary)
1922-1924: V. I. Lenin (Communist)
1924-1941: J. V. Stalin (Communist)
1941-1942: V. M. Molotov (Communist)
1942-1942: K. Y. Voroshilov (Communist)
1942-1959: A. A. Zhdanov (Communist)
1959-1960: A. S. Shcherbakov (Communist)
1961-197?: M. G. Pervukhin (Communist)
According to official Soviet histories, Stalin died heroically in the Germans' (briefly) successful occupation of Moscow, refusing to evacuate. It is more likely he died in the process of evacuation, though whether he was taken out by the Nazis or an internal coup attempt remains an open question. Molotov briefly took the reins of power with the assistance of Zhukov, but the realities of the front meant that Marshal Voroshilov (who had successfully relieved Leningrad) was soon the one calling the shots, soon handing over formal political power to his ally (and Stalin protegé) Andrei Zhdanov. Both Voroshilov and Zhdanov were regarded as heroes, and the latter had soon consolidated his power over the USSR after the Germans were expelled. Zhdanov's corpulent deputy Shcherbakov briefly seized power after the former's death in 1960, but was soon removed by a troika (and died soon afterwards under circumstances that may not be as suspicious as they first appear - his lifestyle made heart problems inevitable). From this troika, after mutually-assured destruction between several bigger but more divisive names, the technocrat Mikhail Pervukhin rose to power - initially as a figurehead for more powerful interests, but later asserting control in his own right.