2 Paladins: Gives you access to two auras, two blessings, Heals, Rez, Judgements stack (passive healing/mana for now).

1 Feral Druid: Mark of the Wild, thorns, heals, battle rez, Leader of the pack.

1 DK: Honestly not sure what they bring to the table, but ive seen the vids so they have some auras and a pet. (only played one in the starter area)

1 ENH Shaman: totems totems totems.

Im not sure how some buffs/auras/totems will stack or overwrite each other. But just off the top of my head I see 4 buffs from the paladins. 3 from the druid, at least one from the DK and upto 4 or more from the shaman? Thats 12 buffs on each guy out of the gate, not counting self buffs.

Might be fun to try, not sure how they will do in endgame heroics and stuff.