Looking for a more ambitious way to play against the QGD as White, mainly for league games against IMs and lower-rated GMs.
My problem with the usual systems is that Black often gets a very familiar, comfortable position. Against Bf4, the ...Nbd7 and ...c5 setups seem very well worked out. Against Bg5, Black has ...b6 or ...Nbd7 and ...c5. In the Bxf6 lines, ...dxc4 often looks like an easy solution. Even the Exchange and Catalan feel quite solid and easy to play for Black nowadays.
I’m not looking for an unsound surprise weapon, but for something that creates a more unbalanced, difficult game where Black cannot just play the first 10–15 moves from general knowledge.
For comparison, I have had very good practical results with the early h4 idea against the Grünfeld that had been recommended here. Is there something similar against the QGD: sound, less common, and practically challenging?
I normally enter via 1.d4 d5 2.c4 e6 3.Nc3 or 3.Nc3 nimzo's, if that matters. Specific lines or repertoire suggestions would be appreciated.