The great El Lissitzky, 1919

The also great Rodchenko


The two above and more from Soviet Cinema here

Above from International Poster

Rodchenko again, seen all over.

Stenberg for Potemkin, very nice

This from a painter, Lebedev, seen here.

Two above,  from here, are particularly upbeat.

There is a fine book about soviet posters, called just that, see here