Tankie is a pejorative label generally applied to communists who express support for one-party communist regimes that are associated with Marxism–Leninism, whether contemporary or historical.

Basically those "communist" who they should be in charge of the "transitional" period into a stateless society.

There really isn’t anyone who is a stalinist, Stalin had some important theoretical contributions but not enough to have a branch of thought, he followed lenin’s ideas pretty much.