I have two teams at 80. PVE team is Paladin + 4 x Shaman. PVP team is Druid + 4 x Hunter.

I have a second PVE team around 70-72 (Paladin, Rogue, Shaman, Priest, Warlock). These will for sure make it to 80.

Another team is simply 5 x Arcane Mage, they will most likely make it to 80.

Last team is Death Knight x 5, and it is rather unlikely they make it to 80, unless I feel like making gold from thei questing effort.