You can't just look at THIS year's list and decide. You have to take a comprehensive look and see what's there -- at least 3-5 years.
Based upon the way they are playing RIGHT NOW, I'd say Charles Howell, III. Clarke has 11 international victories, but only 2 PGA (1 match play). Howell already has 1. Howell has finished top 14 on the last 2 year's money lists, so he is potentially a rising star.
If you are looking for career acomplishments for current players, look at Brad Faxon and Bob Tway (8 wins), Kenny Perry (7 wins), Stuart Appleby (5 wins), Jay Haas (8), Shigeki Maruyama (12 total), Fred Funk (6), and perhaps Rocco Mediate (~8 total wins).
Sergio might deserve consideration, but a few guys above actually have more total wins than he does, and he only has 3 in the PGA. Jesper Parnevick has 5 PGA plus another 9 internationally, so he might be it.
Is there anyone I missed in the 15-20 range?