The worst Zelda ocarina song is the Scarecrow's Song, because it's written by some guy who hates the Sun's Song instead of by Koji Kondo.
=p j/p
i can't really decide, they're all at least decent.
p.s. my new scarecrow song = ^ > A, ^ > ^ > A = Rachmaninoff's Etude-Tableu in C major (well, in D now)