Of all the leaders of the Soviet Union there could've been in the 1930s to 1950s, which one would've been best? Now, I'm judging this primarily by three factors.
A. Industrializes the Soviet Union well.
B. No officer purges, no paranoid killings, and so on. Basically, one that can avoid paranoia.
C. Can defeat the Nazis the best. So, would've been the best for military matters, and so on.
Except arguably the first, Stalin FAILS all of these. Trotsky apparently would've have too, except maybe the last one. So, who would've been best?
Also, as a reminder, I'm not judging on their morality. I'm leaving that out for now.