#4 Joachim Löw

Joachim Löw is currently the manager of the German national football team. His record with Germany has been excellent with at least a semi-final appearance in all competitions he has managed, expect World Cup 2018. He also won the World Cup with Germany in 2014 and the Confederations Cup in 2017 as well.
Every time there is a managerial change at the Bernabeu, Low's name is always linked to Real Madrid. He also added fuel to the fire in 2018 when he said that the Madrid job interests every manager.
Bringing in someone like him would be a risk but the last time the Los Blancos took such a risk they managed to win three consecutive Champions League and a La Liga as well. But considering how well he has done with the Die Mannschaft it seems like it is a calculated risk worth taking.
Low's record with young players and his new ideas in club football they could just be the ideal match for the Los Blancos. Given how Germany were knocked out of the World Cup in Russia and failure to reach the semifinals of the Nation's League could mean that an exit as the Germany national team boss may be near for him.