The Third Man is another good film noir of that era with Orson Wells.
Some very memorable lines.
That too is another great film, but now, I can’t get the theme song out of my head!
As long as you mention that one, you might as well add Touch of Evil, although Joseph Cotten is only in it for a minute.
You might as well add, Journey Into Fear and The Lady from Shanghai (The Stranger, The Lady From Shanghai, and Touch of Evil are directed by Welles, the other two were not.)
The Third Man is good also.