You cant go wrong with some Denzel Washington films.
Man on Fire has to be one of my favourite,
I also Recommend:
Remember the Titans, Antwon Fisher, Training Day,The Hurricane, Glory, John Q all great Films.
Firstly, underrated films, several of those were big hits(undeservedly) and severaly you listed are utter crap, John Q is such formulaic crap and a repeat of a hundred films done before, with a host of terrible actors, poor dialogue, plot holes and a crap performance by Denzel. The Titans was an average flick, The Hurricane is the only truly very good film on that list that was underrated and seen by very few people(going on the fact almost no one I know has seen it, not sure how it did at the box office).
The Man from Earth and Cinderella Man
I have no idea why Cinderella Man wasn't a massive hit in the box office, it is an incredible film.
Cinderella man wasn't a massive hit, doesn't make it under rated, its ok, nothing more nothing less. Considering its got Renee makes you want to kill yourself fat mouth like a puckered ass Zellweger in it, its not surprising people didn't rate it fantastically. Even besides that, despite two strong acting performances, frankly, the story is a touch weak and it doesn't really have the depth it pretends to have in it.
Not sure how well recieved Red Belt was, Dirty Pretty Things by the same lead actor as Red Belt was also stonking, though it won awards I believe and critics loved it, still seen by very few people and don't think it did great in the box office. Both great films that seemed to get very small releases with few people seeing them.
The Game(sean penn and Douglas,) is a great flick also with a low key release, fairly useless for rewatching once you know whats going on but one of the best films to watch first time around, truly superbly done start to finish, direction, style, dialogue, script everything is top notch and no ones seen it.
Hurley Burley is another film I don't know anyone whose seen it, very funny black comedy, great cast, great acting, very funny.