[mmaibff]

I haven't read ouran or bleach, But I think
Trust: works pretty well for Naruto/any pairing
End Roll: for Naruto/Sasuke (friendship/or w/e you like really I don't know how you feel about that sort of pairing) after the the sasuke retrieval arch

marionette also seems like an interesting one you can write a song fic on but I'm not too sure one what the couple would be.

I don't really know what kind of couple you like so its kind of hard to suggest some songs.