#1 Adrien Rabiot (PSG)

Rabiot's contract with PSG ends this season and thus he can leave for free to any club. It is reported that Barcelona has already agreed on a deal with Rabiot. The French midfielder will join on a five-year contract with a salary of €10 million.
Rabiot is not a person who is a fan-favorite at Paris. He is said to be an arrogant player who has previously had problems with the club due to his attitude. The troublemaker tag is certainly not one that the Cules fancy in their players. But on the contrary, he is still young and a good mentor and a different atmosphere could change everything. With Busquets to mentor him who is of a very calm demeanor, Rabiot could have an attitude change.
Rabiot is also skilled and he could adapt to the situation at Spain. The salary is another thing that causes an outburst as he will earn more than Alba and Busquets. But as a silver lining, if Barcelona had to pay for his transfer it would cost €50 million plus. Maybe the board considers this a bargain due to the amount they save on the transfer fee.
In all due respect, Rabiot is not worthy of being paid higher than Busquets and Alba at Barcelona but Alba will have a contract renewal as well. But everything said Rabiot is pretty much Barcelona's first summer signing for 2019.