Cleric
I'M A PRIIIIIIEST
I'M A PRIIIIIIEST
ACCEPT MY BLESSING AND OR CURRRRRRRRSE
I'M A PRIIIIIIEST
Also: Extremely awesome in 3.5 (pretty much, if you don't have one in your group, you die.(unless you have a druid or another healer class from one of the splat books, although cleirc is still arguable the best of them))
ADDITIONALLY: The cleric is one of the traditional healer classes of the DnD franchise, and is arguably one of the best for filling this role. In 3.5, both clerics and druids could be considered overpowered for their ability to heal as well as dish out some pain in melee combat (especially the druid, who could heal the entire party with one bear-paw while beheading hobgoblins with the other). However, clerics also fulfill a traditional role of holy warrior against the undead. They possess greater turning power than the paladin, and can be outfitted in almost the same level of armor. Usually with a high will save resulting from a focus on the Wisdom ability, the cleric presents a difficult challenge for any DM to knock off, especially when supported by a full party. Thankfully, there's always "Rocks fall, everybody dies".