Gilda, Sunset Boulevard and The Third Man are among my favorites too. Others are Kiss Me Deadly, Night of the Hunter, Laura, Rififi, Double Indemnity, Strangers on a Train, White Heat and The Postman Always Rings Twice.
There's probably more but I find it - at times - hard to separate them.
Awesome post of one of my favorite (sub)genres in cinema :>)
Thanks, Vincent! I'm not sure if I've seen Kiss Me Deadly or Rififi--I'll have to check those out!
If you have, I think you would remember them :>)