Not sure if I'd say they were underrated, but not well known on your side of the water:
Sexy Beast Gangster No. 1 The Long Good Friday The Krays (I don't like it, but a lot of others do)
Mick
...dot com bold typeface rhetoric. You go clickety click and get your head split. 'The hell you look like on a message board Discussing whether or not the Brother is hardcore?