great list ... some candidates from Hong Kong:

A Better Tomorrow 1 (the gun-fu from A Better Tomorrow 2 mixed with the story from #1 would be superawesome)

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The Mission (Johnnie To director, not the De Niro movie)

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Election
Triad Election (aka Election 2)

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Rich and Famous
Tragic Hero

Both starring Chow Yun-fat - made to be one movie, but it was so long, they cut it to 2.

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Young and Dangerous series (1-6, Official Prequel) (this series from late 90's was so popular that it had a few unofficial sequels)

A group of 4 buddies joined a Triad and slowly rise through the ranks to end up on top ruling





probably a few other worthy candidates, but those were off the top of my head