5. Joachim Low
When rumours of Arsene Wenger's departure arose last season, Joachim Low was named as one of the candidates to replace him.
Though Low has not been involved in club management for a while, he has been incredibly successful with the German national team in the past few years. He is yet to win a major tournament with the team, but definitely has the potential and ability to do so.
Low manages the national team with a special focus on the youth, making him a good candidate for Wenger's replacement considering the amount of youngsters in the Arsenal side. He also knows the German players at Arsenal, which is a plus.