Does that prevent WWII or alter its outcome to any significant degree?
IMO the answer is "highly likely" to both.
Assuming that Goering makes the same sort of coup de etat that Hitler did, then he is charge.
I can see the remilitarisation of the Rhineland, repudiation of the Versailles Diktat and Auschluss all happening - as there was much grassroots support for either it.
Now Munich - that's a Good Question
A "no Hitler" WWII is quite questionable ...
As to which murderous psychopat rises to the top in Moscow - I've no idea.
With a weaker grasp on the country, would the Chairman cross ideological lines and make a deal with Goering (if Fatty is willing), thus starting WWII?