I'd have to second the pally/priest/mage vote. I play as protection pally, holy priest, and frostfire mage. I absolutely love it.

Questing is a breeze. Quick bursts from everyone to take down single targets fast, lots of aoe power to take out groups, and the holy trinity makes those group quests super easy.

Instances are also quite easy with this group. I just grab two random people and run heroics. It's also nice having three unique rolls at 80. When I need a break from multiboxing, I take one of my guys to raids. Since they each fill different rolls, it makes raiding much more interesting. A lot of the fights are very different depending on your roll in the raid group.

I'd say if you're after PvE, give this group a shot.