Hydde would be the most noticeable example.
The guy scored 10 goals and provided 15 assists despite having a poor start of the season when the WHOLE team underperformed. Also it's not about Pogba carrying the whole team, there are 10 other players as well. We seek a powerful synergy, to work as a unit and Paul is a fundamental part of it as he's been 4 years with us. To sell him and replace him with another player (WC or not) would take us back to square one in midfield as it would take a while for the new players to acclimate to our way of playing.