A list of only 25 American movies like this must be general, even if personal favorites. There are no films listed from Chaplin or Keaton, no classic horror, no silent films, no Japanese, Indian, Swedish, Russian, German, French, Italian (ok: one), or British (pretty much). There's not even too much in the way of film noir, Westerns, or gangsters. But these and similar films are well worth seeking out, or keeping an eye out for, even if you somehow feel repulsed by black and white. See the list at:
Black & white movies are good (really): 25 great movies in black & white