At this stage, a very good summer for me would be something like:
Raya from Brentford (provided he is as good as is touted).
Hakimi from Inter. Worth the big bucks he'd cost. He can't defend for toffee, but neither can Bellerin. And in attack they're worlds apart.
Bertand from Southampton or van Aanholt from Palace on a free. Adequate cover for a season or two.
Bissouma from Brighton. Some much needed pace and athleticism in midfield, to help out Partey, and make us less reliant on his dominating on his own in every game.
Aouar from Lyon, if Ødegaard doesn't cut the mustard. I think the advantage with the Frenchman is that he is more a centre midfielder than a 10, and I think that'd be more useful moving forward.
I think we still need a wide player as well, depending on where Aubameyang is going to be played, and then what the plan is for Martinelli, because I'd sell Pépé. He's been pretty good recently, but I still think he doesn't fit in and won't flourish here.
Bellerin, Chambers, Maitland-Niles, Guendouzi, Xhaka, Nketiah and Lacazette all also sold to raise funds.