Well.. Considering that "The Void" which is spoken of in so many Final Fantasy games, seems like it is canonically connecting each and every one of the games, those beings who are known to cross the Void would indeed be ideal.. And Enuo in FFV:A, along with Shinryu were really enjoyable.
There is perhaps no phenomenon which contains so much destructive feeling as moral indignation, which permits envy or to be acted out under the guise of virtue. - Erich Fromm