Paladin type class in most fantasy games/settings. However, in D&D 3.5 it would be Fighter over Paladin due to having more perks.
Paladins are not always "Light worshipping", they are rather defenders of some idea/ideal. So it is not like they are on opposite side of warlocks/necros :PWhen it comes to fantasy, I'm at the extremes of loving my "Evil" Wizards, locks, necros (love summoning pets and applying debuffs) and Light worshiping Paladins/Crusaders (usually the very hard to kill class). I honestly don't know why.