First I'd like to see Lookman or Onyekuru given a chance. But if that can't happen my dream signing is Ziyech. That's unlikely too. The other guys we've been tentatively linked with like Under, Neres and Malcom would all be good moves imo.
If we really don't want to move Richarlison back to the left then Lozano, Iwobi, and that Everton playing for Brazil currently are all decent enough. There are honestly probably 40 players who would work.
Edit: Milot Rashica at Bremen is also a solid player who we could probably get with minimal effort. Forgot him.