Hermann Abendroth

Hermann Abendroth was the leader of the Leipzig Gewandhaus Orchestra in Nazi Germany. According to Hans Engel, Abendroth was a "fine leader", who renounced his liberal ideals. Hans served under him until he enlisted in the army. (COMIC: The Instruments of War)

Behind the scenes
While Instruments of War does not mention Mr. Abendroth's first name, the story is obviously referring to him.