Divine Grace is sort of a defining ability for the Paladin.
Theres not much that can make me say, yeah ok let me lose that for this other stuff.
A 16 base charisma, leveled up to 20 or so, a +6 Charisma Item gives you +8 to all saves.
THEN add in a cloak, thats +13 to all saves.
Anyway, yeah the leadership feat is pretty much all you can do.