I think it is a safe bet that all of Germany, and perhaps other areas of Eastern Europe would have become part of the Soviet Bloc. Stalin had attempted to take Berlin right after the end of the war; an attempt that was only ended by the Berlin Air Lift. Europe had been devastated by the war; which is fertile ground for radicalism. With the soviets determined to dominate the world, Europe would have been an important first step for them. Turkey and Greece most likely would have become part of the Soviet Bloc. Nato probably never would have been created. The Cold War still would have occurred, but the balance of power would have shifted to the East, and the map of Europe would have been drawn much differently in 1960.
There is, of course, no way to know what might have happened if things had been different. You could argue, however, that Western Europe would not have been so united against communism by 1960 if it were not for the things you mentioned.
If it were not for these things, Europe might not have felt so sure that the US would defend them. Turkey and Greece might have become communist, giving the rest of the continent the idea that they might be next. The countries of Western Europe would have been poorer and less grateful to the US. This would have also made them more likely to become communist or to at least have some sort of close relationship with the Soviet Union.
It is at least arguable, then, that Western Europe would not have a relatively solid anti-communist bloc in 1960 had it not been for the Truman Doctrine and the Marshall Plan.