I exclude Tankies from the far left. Because at its heart, the left is anti-authoritarian. Tankies lost the plot somewhere and decided that full authoritarianism was the way to go, regardless of the human suffering that lead to.
An authoritarian regime that claims to be communist is no closer to the communist ideal of a stateless utopia than a fully capitalistic state. If the capitalistic state is democratic with popular socialist programs, then it's actually closer to the communist ideal than an authoritarian state that merely claims communism. I'm using European democracies as my gold standard.