Lenin.
This is a weird little debate. The communist party called themselves Communists and they always claimed they where building Socialism with Communism as the ideal. They never claimed that they already achieved Communism.
And Trotsky's concept of permanent Revolution with Russians as canon fodder sounds nice and all but that was shut down when they got their asses kicked in Poland. To spread the wonder of Communism you had to develop an industrial base and a war machine capable of standing up to the Developed Capitalist countries and that is what Stalin was doing.
The party under Lenin never claimed it was building socialism and was instead was concerned with the democratic dictatorship, industrialization was part of such as it represents the completion of the bourgeois revolution. It does not represent socialism, and to Lenin mere political power for the working class wasn't either.
What you said has nothing to do with permanent revolution, and what Stalin and the USSR was doing was not spreading communism, it was finding a nice comfortable place for the imperialist soviet state in the world. The USSR was little different from any other bourgeois nation-state, it even tried to act like a nation.