It won’t hurt Ganz. He’s been an actor for decades with a HUGE body of work in every language. The George Reeves/”Superman” story is a myth. But I’ll agree, I can’t see Daniel Radcliff as anyone but Harry Potter. Or Elijah Wood as anyone but Frodo.
I was only ten when the news hit that George Reeves was found dead, an apparent suicide. We cruel kids joked that he put on his Superman costume one last time and leaped off the Empire State Building observation deck. But the Wiki entry states that Reeves did it the old fashioned way with a pistol. Speculation as to motive, of course; he was not unemployed after the Superman series ended, but lived in the shadow of the character he was best known for.
Bruno Ganz is an accomplished actor, but just how many films produced in Europe even make it to this side of the pond? The last German film I can recall is “Das Boot” (1982).