We know some obvious departures: Pogba, Matic, Mata, Lingard, Cavani.
Ideal departures (though in reality, most of these guys won't leave): Wan-Bissaka, Telles, Dalot, Bailly, Jones, one of Maguire or Lindelof, Tuanzebe, Pereira, Martial, Chong. If I was a gambling man, I'd say one of the RBs...