Paladin

From the introduction: The Oath of the Bulwark is a vow to defend others and put their safety above yours. Paladins who follow this oath are selfless, heroic souls, and the most iconic of heroes. ... The Oath of the Holy Light is an ancient code swearing to bring light and comfort back to the world. When nights grow darkest these paladins stem the tide of darkness with holy magic, and when the dawn comes they heal their charge's wounds. ... Not all paladins loathe undead or fight for others. The Oath of the Undying is a solemn vow to walk the earth eternally. Followers of this vow aim to transcend the limits of their mortal bodies and to become everlasting.