@Night Prowler: that's amazing! Have you ever heard one or more Senmuth albums? I wonder if you can recommend me one. Is it even possible to point out some of his most famous ones, when we're talking about such mindboggling numbers?
@Mosh and Sixes: I could count it but then the Metallica and Lou Reed album should also be counted in Metallica's own discography (I doubt if Metallica fans would do that and it's also not on their "own" list on wiki).
Something else: I wonder if there are more country artists who recorded a few dozen of albums, year after year. I didn't leave out Jazz for nothing, but maybe Country artists are as productive as Jazz artists?
But let's make Johnny Cash the winner. He has an uninterrupted string of 32 years releasing studio albums (1957-1988).
I still hope you guys want to continue this quest: Which British rock band am I still looking for? They probably have -in rock and pop- the most years in a row of studio album releases without interruption.