There's plenty of variation aside from Kaganovich and Sablin as far as socialist Russian leaders go. Tukhachevsky, Yagoda, Suslov, Krushchev, Bessonov, Zhukov-> Ryzhkov (I'd say Yakovlev but he's a lib), Siberian Black Army -> Siberian Soviet, and Bukharina in order of how idealistic and optimistic you want to be. Also Humanists in Tomsk but they're more Utopian Socialists. This isn't even getting into the insanity of Russo-Juche Rurik II.

Yes, I play this mod too much and just want an excuse to talk about it. How could you tell?