Chris Doss
Not really that many. If by "Stalins" you mean mass-murderers with personality cults, there's just Stalin himself (and his circle, by extension), Mao, and Pol Pot (and their circles, by extension). Maybe Ceausescue? (I think Stalin was completely rational and not "batshit crazy" until at least the year or so before his death, but that's another matter.)
I think that that these leaders rose to power against a background of total state collapse probably had something to do with it.
^^^^^^ Does "personality cult" critique originate with Comrade Khrushchev ? Is it founded in Marxist-Leninist principles,not liberalism ?