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I would give the FC listings a good once over and see if there is anything there that catches your eye. You mentioned what classes/archetypes you play but not really what you are looking for story-wise. Are you looking to be adventurers and mercenaries? Are your characters good hearted people or more of an evil alignment? That would help narrow down the choices significantly.
If you are looking to stick with paladin and your SO is ok being a knight you could check out Knights of Eorzea run by Ryslo. I have RP'ed with them and they have a pretty good storyline that I would say fits your serious RP style. Along that vein if you want something FC agnostic you can check out our LS for Hydaelyn Protectors we have some pretty good plots going currently.

Hope that helps!