They actually came after The Fabulous Ones who were the first of the "pretty boy" tag teams that became a thing in the 1980s.The rock N roll express was really the first of their kind.
Before the midnight express, the hardy boyz, Brian Kendrick & Paul London, the motor city machine guns, young bucks, etc.
Rock n roll express laid the foundation to those groups.
Jerry Lawler even put Morton and Gibson together as a second option to the Fab Ones when they couldn't wrestle on certain cards Lawler was promoting. Then after the RnR Express came The Fantastics and then it was just a standard wrestling gimmick,