6. Pierre-Emerick Aubemeyang
The soccer world thought that Arsenal pulled off a coup when they signed Aubemyang. The Gabonese striker proved that he was one of the best forwards in the world. However, he tired of being their focal point because the club showed few signs of progression. This put him at odds with the team’s manager, Mikel Arteta. Furthermore, Aubemeyang wanted more money.

Arsenal didn’t want to match his demands because of his age and their wage structure. After one of the most intense contract holdouts in recent memory, they sent him to Barcelona. Almost immediately, he became one of the Catalan giant’s biggest stars. He also made more money in Spain than in London. It’s safe to say that he was the winner because he achieved everything he wanted (via The Mirror).