FDR deserves his ranking. However, bringing the U.S. out of the Great Depression had a whole lot more to do with the production required to fight a World War on two fronts than it did on the New Deal programs. The people that tout the New Deal as an example of the success of Keynesian economics leave out that very important fact.
Like you said though, it's not fair to hold FDR responsible for the generations who bastardized his work. He set up his programs to incentivize work, unlike the current programs brought on by the Great Society which kill the work ethic of many recipients of aid.
Without a doubt, FDR deserves his spot on this list. If you live in rural areas, and you enjoy infrastructure like public power, paved roads, telephones, and flood control (dams) then you can thank FDR.