Way back in Ancient Times when the Atlas F1 Journal still existed, Peter Goodchild and David Southworth submitted an article that considered this issue: http://atlasf1.autos.../goodchild.html
I ended up writing a series of columns on their top two seasons, 1982 and 1961, in Rear View Mirror. Actually, I had already written about 1982 previously, but their article came out as I was in the process of putting together the 1961 season.
Given that I saw my first world championship GP 70 years this June, the GP de Belgique at Spa-Francorchamps, I might have a bit of perspective on this topic.
I still think that they got most of it okay up to that point, 1999, although I would rank 1964 much higher than their eighth, of course.
Long ago, I realized that "F1" was pretty much a self-licking ice cream cone, especially after considering the notion of Albion Triumphant in the 1958-1960 years in retrospect.
Nor have I ever quite bought into the Ferrari Mythology. Then again, it was a very different world when I started paying attention to the sport.
RE: 1983. Goodchild and Southworth had it high on their list, and for very good reasons.
As a historian, I have long since regarded the various seasons as all having their reasons for being Interesting. By that, I meant much of that interest might not necessarily be what takes place on the track.
While 1957 seems boring to an extent, there was the element of the poor, pitiful Brits finally winning with Vanwall, of course, but the real interest was the struggles of both Maserati and Ferrari behind in the scenes, which did not necessarily mean simply the GP stuff.
"Greatest" is what YOU think it is, whatever others might think.