Question: What school of composers was attended by the composer whose operas were considered the only German ones more important than "Die Soldaten" by Bernd Alois Zimmermann?
Sentence (from "Bernd Alois Zimmermann"): Bernd Alois Zimmermann (20 March 1918, Bliesheim, Rhine Province – 10 August 1970, Königsdorf (Frechen); full name "Bernhard Alois Zimmermann") was a West German composer.
Relevant evidence: No