3 Shammies + Resto Druid hit 80 a while ago {husband plays the 5th in my groups}
3 hunters + Holydin hit 80 last week sometime.

Had kind of a big gap between the 2 sets since the hunters were only like 40ish when Wrath hit. Leveled them as a 5-hunter team until 60, swapped one out at 61 for a rogue and another out at 63 I think for a balance druid {pushing those 2 up to 70 for professions stuff} before finally catching them up to my holydin and my husband's tankadin.

We only PvE, so we were looking to cover our bases for tanking and healing. Two of our friends also multibox and they have warrior and priest covered, plus whatever DPS they have, so hopefully we'll have a good mix for any given situation once we start raiding.