The more I think about it, I think I would do a White + Hauser + 2-3 picks for Murphy + role player trade, and then next summer you get off George's contract and essentially add another star player and form a Big 3 with Tatum, Murphy and 3rd star with most of Robinson, Queta, Hugo, PP, Baylor still intact.
That said, it seems this team values White a lot so they probably don't want to move him. But his 30M a year contract doesn't look great either and I'd be surprised if he doesn't regress in the coming years too, you might be better off pouncing now and adding a 26 year old Murphy to this core.