The model most compared to it, and much celebrated recently, is the European model, ECMWF.
That model has proven to be more accurate 3 to 7 days out than the GFS.
I'll typically lean toward the Euro for medium range forecasting. It nailed both the blizzard of 2013 AND the following weekend miss of a huge storm with just moderate snow on Cape Cod and at the coast while the GFS was all over the place with both storms.
The GFS was the only model consistently calling for a lot of snow the weekend after Valentine's Day and it was wrong. Glad I didn't go with it.