Some decent squad options that should be available at cut prices from the relegated teams. Players like Pope, McNeil, Cornet and Tarkowski at Burnley, as well as Dennis and Sarr at Watford should all be considered by PL clubs.
However, for me the stand-out player that should be of interest for us is Joao Pedro at Watford. I think he's a player with the potential to develop into a top class forward in the future, still only 20.
Somewhat similar to his predecessor at Watford, Richarlison, he's a versatile and hard working forward that contributes defensively.
As Ronaldo is probably staying for another season I think Pedro would be a fine option as backup and rotation for a season with the potential of being our long term solution in the striker role.
Transfermarkt values him at €10m but lets say £15-20m and he could be a bargain for the future with a role to play already next season.