Greenwood, Martial and Sancho, for very different reasons, need to be off the books.
For purely footballing reasons, from how we want to play to paying premium wages to players who are seldom fit for selection, you could make a case for any of Rashford, Bruno, McTominay, Casemiro, Varane, Martinez, Shaw and Antony.
The problem is getting a squad capable of consistently controlling games isn't going to happen overnight and the transition period will be extremely ugly if recruitment isn't 100 per cent right away.
If we were a team trying to make that final leap to contenders then selling Bruno, for an upgrade, would probably make more sense. However, I think our problems are deeper than that and there are other areas that need addressed first.