I put some more thought into this, and eventually gave up. The problem is, there isn't one single chart that will allow you to plot song success objectively for the Floyds' entire career. Some charts plot the number of times a song is played on the radio, others the number of units sold. But PF released so few "real" singles, not counting the many scattershot promos in different markets, that you can't really do what the Beatles did with the album
1 and use a definitive list the whole way through. Nor can you use a single "most often played" list because such a thing (to my knowledge) has not existed for the entire length of PF's 30-odd years of recording history.
You have to make a subjective decision about what criteria to use, and what charts to combine together (if any). And then you just end up with weird-looking lists that just don't feel right (like Jawbone's, IMO). It's enough to make one barmy.
