He was brought up in the staff discussion before this was launched but as I said, he's averaged an album every 2 years or so throughout his career up until the recent decade gap, and that's due to a lot of factors including health issues, so he didn't really qualify. That's a danger with a lot of longstanding artists, just because they haven't released one in a little longer than "usual" doesn't mean before that they weren't churning them out (good or bad, irrelevant for now). Bowie sometimes had 2 or 3 out in one year even, for example.
I think Thrice are a good example of quantity and
quality, mostly made possible by their diversity I feel. My friend and I got talking to Ed one night after a show in Amsterdam and we asked him how they viewed their dramatic difference in styles, and he said it was because they're sense of identity was a love of music rather than holding any particular style as their identity. Kinda off topic but just thought I'd share with the group.