My unpopular theory is that Tav is probably the player who we could sell with the minimal impact on the team.
Patterson has shown he is more than able, and that new contract should see maximum price secured if we do get a serious offer in.
I’d be more concerned about Goldson, Helander or Kamara generating interest.
Our defensive partnership over recent months has looked solid and while Katic, Balogun etc are tried & tested to some extent, coming back from bad injury in Katic’s case is likely to be bumpy and then the loss of Goldson’s organisation across that defence would be something to replace.
Midfield is where we need a bit of thought & investment IMO.
Jack, Kamara + 1 across the midfield should be the future over the next year but that is subject to Jack’s fitness and Kamara staying.... and finding someone who can sit just in front of them and support the attack AND slot in to support the defensive work when needed. I struggle to even think of a player who does that anywhere.