Zhukov was mildly pro-Western (he was, by all accounts, good friends with Ike, and
loved Coca-Cola), and if he was in charge you could probably get things to a low simmer, rather than the near boil it was OTL. If you have Stalin get hit by a bus either right before, or shortly after, the end of the war, Zhukov assuming control, and butterfly away the Warsaw Pact, you could probably keep things cordial.
That, or you'd need some mega-threat (along the lines of the Nazi's) to get the USSR and the West to decide that, as much as they don't like each other, the other guy is
way worse. Outside of the Nazi's somehow surviving, the only thing that comes to mind is China (either a surviving KMT or the PRC) going really, really round the bend (again, we're talking Nazi Germany threat levels here).