Fritz Lang never compromised, never went for hacky bullshit and gimmicks, unlike Hitchcock. Lang invented the police procedural, the leitmotif, his use of lighting heavily influenced film noir, which dominated the film industry for decades, made science fiction films respectable, his villains were extremely menacing, his victims sympathetic. He also stood up to the Nazi regime and refused to be a part of their bullshit propaganda machine. You are further trying to compare a genius of a specific school, that of German Expressionism, to someone that made some great films then turned to gimmicky compromised bullshit.
Also fuck Jimmy Stewart, he was a shit actor and a shit person.