Digging through these issues a bit, I now think that the two-headed griffon is worth mentioning, as it doesn't follow the multihead creature template. The fiendish hand graft did not appear in the FF, so I added it as well.
Additionally, I found stats for a sea gull and a symbiont called an airgill, so I added those as well. (The airgill has no stats as a creature, but symbionts are creatures in the FF, so I included it).