That's one hell of a town!
Still though, the late Roger Miller had to rate at least second billing, right? At least second....
My impression was that the sign had first noted Lefty Frizzell -- and Lefty only.
As Sheb made his mark, his name was added.
Then, finally, along came young Roger -- Sheb's cousin, by the way -- to require another amendment.
But as for "body of work", I would agree with you. Lefty first, by a hair, just ahead of Roger.
But "King of the Road" ranks ahead of "Long Black Veil"...