The Paladin with specific spells reskinned as X/day abilities might be even closer to the mark, although that messes with Divine Smite. Actually, someone mentioned the Warlock above and that template would probably work with the right spell list if applied to the Paladin chassis. Some spells changed to X/X abilities with some spell slots left open to power an altered smite. For fluff reasons it could all be reskinned of course, but that's not my main concern from a design standpoint.