Some complications...
The trouble is a lack of access to Germany: another WWII with the Germans as Western Allies? Not good. A disarmed, neutralized Germany, perhaps: a divided Germany, tolerable: an all-commie Germany, excellent. A united Germany in the Allied camp - very bad.Therefore, the desire for a friendly government in Poland, at least.
On the Allied side, a neutral unified Germany was not a pleasant idea, even among a lot of Germans. Commie Germany was unthinkable, so from the Allied POV the divided-but-mostly-western Germany was probably the best option aside from the unlikely all-western Germany. So there were some fairly strong drivers for central Europe to end up as OTL: the fact that atom bombs had really changed the nature of the game (Germany was a far smaller and more accessible target than the USSR) does not seem to have entirely sunk in.
In any event, even without Soviet pressures from '45 on, there will be Red states in eastern Europe. Yugoslavia, which went Commie early '46, is going to be Red even with a less pushy USSR: and the Communists were dominant in Bulgaria from September '44 when the local Reds siezed power with the aid of incoming Soviet forces, who are hardly likely to _prevent_ them from holding onto power. If the USSR plays a role of "good buddy to Red nations, but no military interventions" we might see the Yugoslav-Bulgarian union that nearly took place OTL in 1947, thereby encircling Romania (rather less likely to go Red without active Soviet participation). The Communists in Albania were also quite strong and supported by the Yugoslavs communist partisans.
Bruce