Claus Graf Schenk von Stauffenberg is the correct name. He should never put on the same level with Quisling.
His oath of allegiance when he entered military service was to the republic; only later all soldiers were sworn in anew to Hitler. A former supporter of Nazism he changed his attitude after the pogrom of 1938. His intended assassination of Hitler was not to destroy the Reich, but to preserve it in freedom.
Therefore he is highly esteemed in the republic and especially commemorated on July 20, flags at half-mast.