I kept pushing myself to call in with this, but kept pulling myself back because it happened to be who I was listening to that day, so figured it couldn't ACTUALLY be a good example--it was just what I was thinking at the moment. But here goes:
Scott Walker:
Four great albums in the 1960's (not even counting The Walker Brothers before).
Then a completely DEAD streak for 25 years.
Then a HOT streak from 1995 to today.
Even though that last hot streak is just three albums (or two, depending on if you count Pola X) over the past 12 years. I thought that would be kinda funny to mention in itself.