I think mathematical formulae apply to music as well. For instance, N = the ratio of good songs/mediocre songs for any given band or artist.
It's my opinion that in the history of rock n roll, Led Zeppelin has the highest N ever.
Which is not to say that Zep is the greatest band ever, that is a subjective viewpoint you may agree or disagree with.
I submit however that N is an objective measure, and that of all bands, Led Zeppelin has the highest N.