Here are other songs, not already cited is this run-down, that have a reasonably good shot at a Song of the Year nom.
"We Are Young" by .fun featuring Janelle Monae (which the members of the trio co-wrote with their co-producer, Jeff Bhasker).
"Ho Hey" by The Lumineers (which was written by two members of the trio).
"Lonely Boy" by The Black Keys (which the members of the duo co-wrote with their co-producer, Brian Burton, a.k.a. Danger Mouse).
"What Makes You Beautiful" by One Direction (which was written by Carl Falk, Savan Kotecha and Rami Yacoub).
"My Kind Of Love" by Emeli Sande (which she co-wrote with Emile Haynie).