King Harlem
Superstar
All great picks:The four favorite runs that come to mind first for me....
Miles Davis
Filles de Kilimanjaro (1968)
In A Silent Way (1969)
bytches Brew (1970)
Jack Johnson (1971)
Prince
Dirty Mind (1980)
Controversy (1981)
1999 (1982)
Purple Rain (1984)
Stevie Wonder
Talking Book (1972)
Innervisions (1973)
Fulfillingness' First Finale (1974)
Songs In The Key Of Life (1976)
Rolling Stones
Let It Bleed (1969)
Sticky Fingers (1971)
Exile On Main St. (1972)
Miles Davis: He has so many great albums, I would probably lean towards picking a 4-album run in the late 50s, because of how much I like Kind of Blue and Milestones.
Prince: Another artist with a great discography. I think the 4 you picked would be the consensus. Sign of the Times is my favorite Prince album. So I think I would go: Purple Rain - Around The World In A Day - Parade - Sign of the Times.
Stevie: Might be the best 4 album run of all-time. Marvin is probably more of personal preference.
Rolling Stones: Those are 3 great albums, I'm guessing Beggars Boutique would be your 4th.