Romeo and Juliet - Indigo Girls
Romeo and Heathcliff - “No Myth,” by Michael Penn
Romeo and Juliet, Sampson and Delilah - “Fire” by The Pointer Sisters (?)
Frankenstein - Edgar Winter Group
Werewolves of London - Warren Zevon
The Vampire Lestat - Moon over Bourbon Street - Sting
Isn’t this about werewolves in general?
I am Iron Man.
I thought about that too, but apparently that’s a different iron man for copyright reasons…
Charlie Brown — the Coasters
Superstar (Jesus)— Andrew Lloyd Webber
d&r
Not the same as the comic strip character.
You’re a good man Charlie Brown — Clark Gesner
Ramble On by Led Zepplin has a verse that mentions Gollum.
You know any non-fictional werewolves? 
I’m not sure if this counts, but the Cure song, Killing an Arab is based on the Albert Camus novel, the Stranger and is sung from the persepctive of Meursault.
Don’t Stand So Close to Me - The Police
It’s no use
He sees her
He starts to shake and cough
just like the
old man in
that book by Nabakov
“old man in that book by Nabakov” = Humbert Humbert, thr protagonist of Lolita
“Quinn the Eskimo”? – Bob Dylan
The song title is a reference to the movie Werewolf of London, ergo, it refernces a specific character.
Ta da! 
Uhm,
Superman (It’s Not Easy), by . . . . I can’t think of the band right now.
Cat’s In The Cradle – Harry Chapin (Silver Spoon, Little Boy Blue, Man in the Moon)
Who does the song Daria refer to?
If you’re alluding to the animated show “Daria,” I believe the CAKE song predates the show by a year or two.
I’ll add:
Barenaked Ladies - “One Week” - Mentions Aquaman and Sailor Moon.