In terms of Foreign Ministry options it might be a good idea to break it down into east and west.
The east should have the free city of Danzig as something we can incorporate as well as freedom of movement for people and goods from the Sudetenland. This should only be possible if Poland and Czechoslovakia aren't afraid of aggression and therefore Germany should be demilitarized (blocking the battleship + 2x defund Reichswehr + expose rearmament).
The West already has pretty good options with the renegotiation of obligations. Maybe if we help the left alliance win in the 1932 French elections we could form a "European Coal and Steel Community"? Maybe get FDR to join the League of Nations? Both of those are pretty late game, so idk if something better is possible.