Which players would suit him better yet offer creativity and width and counter attacking?
Yes Jose wouldn't buy Mata now but he has used the creativity of Mata in the final third very much this season and got the goals from him. Mata is slow so definitely is a limited player and would not lure Jose ,but from teams point of view creativity with pace and width and speed is definitely a requirement to improve the attack even further to compete and challenge for ucl. Creativity is a attribute not many players offer on a good level. Besides his work ethic is decent, not very low. Someone like perisic brings different qualities which can be countered in a high level ucl game, but creativity on the wing is a very good attribute which not many players have.
Regarding the selfishness it can really be controlled in coaching, and when the player is good enough to score some selfishness is ok, and maharez has a good shot.
He may or may not do this deal but I feel he's decent for this squad to compete against high level teams.