Prot Pally, Warlock, Mage, Elemental Shaman, Disc/Holy Priest

Grab groups in heroics with the pally, grab agro, and AoE the hell out of everything. Plus you would get mage buffs, priest buffs, shaman totems, etc, back up heals with the shaman, and an oh shit heal with Lay of Hands. Sounds like a pretty solid group.