Atlas -  Weight of the World (Neil Young)

May have missed if, but haven't seen this one yet-
 
The Serpent in the Garden of Eden: "One Bad Apple"
 
(For some, this may crowd the definition of 'Mythological' - My apologies, but I couldn't pass it up)

That's ok.  I've been dying to post something like "Noah - Don't Rock the Boat" but I've resisted. 

I wrote:
 
May have missed if, but haven't seen this one yet-
 
The Serpent in the Garden of Eden: "One Bad Apple"
 
(For some, this may crowd the definition of 'Mythological' - My apologies, but I couldn't pass it up)
 
---
 
Come to think about it, "One Bad Apple" might crown the definition of a "Rock Song"...

Eris/Paris: One Bad Apple
 
Apples figure pretty big in Mythology. I bet there are a lot of folks covered this one.

Kermit--Mama Frog(Ambrosia).  

Legolas - I Can See for Miles (The Who)

Tommy Chong(I know he's a real person, but he's also a character in the movies)--Smoke On The Water(Deep Purple).  

57Gregy
Sysyphus- Like A Rolling Stone.

And don't forget his B-side hit: "Rock Around the Clock", also covered by Prometheus.