Shaman is still the best choice.

Tremor totem is very useful in several dungeons. A lot of people don't realize it also removes charm and sleep as well as fear. Having your healer put to sleep for 30 seconds in dungeons is pretty annoying.

Stoneskin reduces incoming damage on your pets quite a lot. Grace of air buffs your hunters damage and pet armor.

The passive survivability of having a shield plus mail armor is also very nice. There will be times with a pet team where your healer pulls aggro and priests are super squishy and prone to dying fast.