Answer
The answer is Niko Kovač, who led Bayern Munich from 2018 to 2019. During his tenure, the club won the Bundesliga title in the 2018-2019 season, where Serge Gnabry was an integral part of the team. Kovač is known for employing a high-pressing, attacking style of football, and he helped Gnabry develop his skills as a versatile forward.