Well Marx used the term “dictatorship of the proletariat” to describe how a transition would work in opposition to what he saw as the “dictatorship of the bourgeoisie”.

However, if you’re talking about people like Stalin or Mao, you’ll find self proclaimed communists with a wide variety of opinions on the subject. That’s in part because gets difficult to sort propaganda from the truth of the matter. I also mean both western and communist propaganda. To have a guy going by “Joe Steel” as the leader of your republic of socialist workers councils isn’t exactly a subtle attempt to get buy in from working class people.