This pales in comparison to Prince's outpourings.
Yet there is no 5 year stretch in Prince's career that compares to what Stevie Wonder did from 1972-1976.
https://en.wikipedia.org/wiki/Prince_albums_discography
7 platinum albums.
And bear in mind that gave away whole albums that were hits, and wrote classics like Manic Monday (while asleep) and Nothing Compares 2U and gave them away in this time.
If you want a stretch of pure brilliance, I'd pick:
Purple Rain Around the World in a Day Parade Sign O the Times Lovesexy
During this era he was also responsible for most of The Time's output, The Family, wrote a lot of his later hits, and kept plenty back simply for his own reasons which still may not have surfaced.
Also, responsible for the background music in this cult movie https://www.youtube.com/watch?v=KOOwGhaFpVk [NSFW]
For the curious, Victor Wooten, sacred virtuoso bass player said in videos that Prince influenced him on the bass, saying Prince's stuff was unheard of. And Prince isn't even a bass fan, I believe he was more in love with guitar and keyboards.
Stevie has a special place for me as a songwriter but as a performer Prince was next level. Different artists, love both
After his passing I saw videos of rehearsal, where he would drive sound stage check calmly with people, dropping jazz classics from his pocket and being cool with the crew.
A lot of what he did was so brilliant, for so many years, in so many genre.
ps: he also managed to make rock guitarists drop their jaw at the george harrison celebration, all done unrehearsed (for better surprise effect).