Just randomly chiming in, but I think bringing in Zlatan/Bailly/Mkhitaryan would be a solid start to the window. Assuming we go with a 4-3-3, all three should slot right into the starting XI (unless Mou also wants to bring in a more veteran CB to partner with Mike). Overall, it's a refreshing change to how we've usually operated under Moyes/LVG where we'd leave things super late!
I still think Woody is itching for a big splash and to break the transfer record, so I wouldn't count out Pogba joining too if Juve are willing to sell (which I'm beginning to think they won't) and if Madrid balk at the price being asked. And forget the price, pay whatever they want, he'd be exactly what's needed in midfield to drive the team forward.
But if it doesn't happen, it's fine too. There are always other targets. Ultimately, for the first time in many years, I'm confident in having a manager that knows what he's doing and has a good plan for the club going forward.