The numbers change every year or two, so it's hard to stay current.
I would guess Tom Fazio still has the most courses in the GOLF DIGEST list, and certainly the GOLFWEEK modern list, if you are looking at the top 100 or top 200. If you're looking at the top 20 it's a different story.
Almost half of my best work is in Australia and New Zealand, so I do better on the international lists. I've only built 25 courses in the U.S.A., and I think Tom Fazio has that many courses in the GOLFWEEK top 100!