"Street Angel" misses greatness by inches. One of three famous late silent movies starring Janet Gaynor (the others were "Sunrise" and "Seventh Heaven"), it's an ultra-romantic melodrama with enormous power. Frank Borzage, a specialist in this kind of film, pulls out all the stops to make this seem almost like an other-worldly fable; the story is painted in broad brush strokes, and the plot has a few echoes of "Les Miserables." The sets and cinematography are outstanding; Gaynor is heartbreakingly beautiful, and her performance is superb. The film's biggest flaw-- almost the only one-- is that near the end it indulges in a wildly improbable coincidence, and it's always awkward when a film closes on a note like that. It isn't quite as good as "Sunrise--" very few movies are-- but for most of its running length this rich, lush film is an absolute joy to watch.