Personally, I think Oder-Bober and keeping Stettin, with Poland then keeping Lwów. Keeping Breslau is probably not realistic because it would double the length of the German-Polish border
And please, give Glatz to Czechoslovakia, not Poland, to avoid that weird dip in the border.
(I would have preferred a reversion to 1933 borders, but with Stalin, that’s not realistic)