I think we would have to break our transfer record, quite possibly the British transfer record as well for Wharton, in order for Palace to let him leave this summer. I don't think it's happening, in fact I think Wharton will spend a few years at Palace and only move at 23-24 for a big fee, similar to Declan Rice at West Ham, provided his team doesn't get relegated. I also don't believe Wharton and Mainoo can play together in a double pivot, as of now, because from what I've seen and read about the former, he's not a double-pivot or single-pivot #6, and neither is Mainoo. We ideally need a very good, ball-winner, physical #6 behind Kobbie and Bruno who's also a great passer. A player like Carrick was for us. Obviously, we can and probably will have to make compromises, as I'm not sure there's an available player like that out there at the moment, but I don't think Wharton is that player...and for me, neither is Ugarte.
Regarding your dream window, Frimpong is another name I would avoid, unless we are switching to a back 3, which I seriously doubt.