I don't know if you could get copyright release, but John Denver could have produced a real masterpiece if he had only integrated the following minor revisions to this classic:
Almost heaven, Tenn-uh-see-e
Smoky Mountains, Tenn-uh-see-e River
Life is old there, older than the trees
Younger than the mountains, blowing like a breeze
Chorus:
Country roads, take me home
To the place I belong
Tenn-uh-see-e, Mountain Mama
Take me home, country roads
All my memories, gathered 'round her
Miners' Lady, stranger to blue water
Dark and dusty, painted on the sky
Misty taste of moonshine, teardrop in my eye
As you can see, it would be true to the spirit of Rocky Top but has a prettier melody.