We only need one attacking player and that's a right footed winger. We need another Central Midfielder (I think possibly a player on loan or we could try for Ndidi on a free as Emery will return him to his best). We also need another LCB who can play LB who has similar skillset to Pau in ball progression.
So Nico Williams, Ndidi and Hermoso would be perfect. Two in on a free transfer.