RP wise you have options; Scarlet Crusader could be either Holy Paladin and either flavor of Priest. You could have a Dark restoration Shaman (cool mog set to play the part even). Maybe even a Druid of the Flame that goes restoration.
Now if we want the class to be able to give evil visually too, as others have said Disc works and if you are not focused on being optimal you could heavily lean on Shadow side of Disc.