Changes in technology over the centuries, as well as differences in geography and resources, make comparisons seem apples and oranges. However, it is feasible to measure how well a general did with what he had to work with and considering the opponents he faced. In that regard, Washington was an absolutely superb strategist, the best the United States has produced, ever.
Personally, I wouldn’t go that far; in fact, I think one of Washington’s own subordinates, Nathanael Greene, was a superior strategist. But I would agree that Washington was a gifted strategical thinker, able to balance purely military factors with larger political considerations.
Palmer makes his case in a book published last month.