In a warlord infestation scenario, I assume the Russian KMT's rivals would have been:
-a patchwork alliance of eastern Cossack autonomists, migrating ultra-monarchists, and closet Buryat nationalists in the Far East, led by Semenov; probably a blatant Japanese puppet.
-(possibly) Don Cossacks
-a Bolshevik holdover or random peasant republic buttressed by elements of the SRs' left wing
-separatists in or around Kyrghyzstan
-(possible) conservative officers + business class revolt centered in Omsk
-Ukrainian nationalist and/or atamans
-one or two additional separatist mini-warlords