#2 Dean Henderson (Manchester United on loan at Sheffield United)

Dean Henderson has spent two seasons away from Old Trafford but is still on the books at the Manchester Club.
In 2017, he went out on loan to Shrewsbury Town, where he was voted the club's player-of-the-season. This prompted Sheffield United to take him on loan for the 2018-19 Championship season and, once again, he was voted as the Blades' player-of-the-season as they fought their way back up to the Premier League (are you noticing the theme here?).
The young star-in-the-making has already been capped by England at U16, U17, U20 & U21 level and is highly regarded by all who have witnessed his display at the net. He might not yet be ready for the crushing responsibility that goes with being in goal at the Stretford End, but why shouldn't United keep faith with Romero for one season, allow Henderson a season of top-flight football in the EPL with the Blades and, assuming all goes well, give him the number one jersey in time for the 2020-21 season?