11. '2 Guns'
Wahlberg teams up with Denzel Washington as a pair of crooks who are secretly both working for the DEA, and Naval intelligence, respectively. But when they're double-crossed by their superiors, they find themselves increasingly, and reluctantly dependent on each other. This is a terrific example of how Wahlberg is at his best when he's got someone to play off – in this case, Washington's grizzled, bitter agent, who makes an excellent foil for his younger co-star's loose-cannon antics. Very underrated.