I dont think any order-specific talent is very useful though.
Not even the Kind Wayfarer's Strange Mercy talent that grants endurance to the paladin and nearby allies whenever the paladin defeats an enemy? Sure, it won't be that useful if you make your paladin into a tank with defensive stats and sword & board, but if you make him into a DW or 2H damagedealer with offensive stats?
I have a hard time seeing how any of the five paladin orders available to players can be considered "righteous warriors of light" except as a joke.
Darcozzi Paladini - elite agents of the Darcozzi family, known for their extreme loyalty towards the family member they serve, participating in intrigue and plots including against other members of the large family.
Goldpact Knights - mercenaries adhering to a code of honouring their contracts. These are the mercenaries to hire if you want henchmen you can rely on regardless of danger or morality, as they don't let such minor issues sway them from what is important, namely money. In other words, they are the ideal mercenaries.
Bleak Walkers - unyielding warriors devoted to the ideal of ending conflicts swiftly regardless of costs to others. These are the guys to call if you want to burn a village to save it for its own good. Or for your own good, for the matter.
The Shieldbearers of St. Elcga - professional warrior-diplomats, who believe you get further with a kind word than a cruel.
The Kind Wayfarers - Guides and protectors of travelers. Earn lunch money by selling maps, travel guides, and acting as paid tour guides.
That part was a joke indeed, the part about buffing them wasn't.