Here is a riddle for all true fans of THE BOSS!

"He's neither the Boss nor the Lord, but he is the King!
Who's the "King" in question?

Hint 1: Elvis is not the only King!
Hint 2: Has Martin Luther King or B.B. King anything to do with the Nebraska album? I don't think so... Dennis King actually helped making the album but he is not the person you're looking for...
Hint 3: The King you're looking for is somehow connected to the Nebraska album.
Hint 4: King is not a name!"
Who's that "King"