how could you put Vin D and not Bruce W Other than XXX, I can't even think of any other "action" flicks he's been in...I guess F&TF is also considered that? I think the cars did all the action there!
I think Bruce Willis is by far the best action star in terms of dialogue delivery. His best in my opinion was 'The Last boy Scout' with Damon Wayons. His one-liners were always perfectly timed and delivered, and funny. Someone also mentioned Robert De Niro earlier. I think his best action films were Ronin and Midnight Run. Another good action star is the guy who placed Wolverine in the X-men series.
Where is Jackie Chan? How come you missed him? Or Bruce Lee for that part? I rate them as number 1 and number 2. Rest every body can follow them though!!!