A book I am reading list these as borderline characters:

Blanche Dubois in A Streetcar Named Desire
Martha in Who's Afraid of Virginia Woolf?
Sally Bowles in Cabaret
Travis Bickle in Taxi Driver
Howard Beale in Network
Carmen in Bizet's opera

I haven't seen half of these and the ones I have seen, it has been years. So i can't tell you how accurate I think it is.