Tauren: I wouldn't. Their HP buff is getting a slight nurf, and they have a larger hitbox. As a multiboxing shaman team that will work against you. Also you may never use their stomp once you get Thunderstorm.

Troll: Best for 5 man instances/raids. Their haste racial will help you take down those bosses without hurting your healing if needed.

Orc: Best for PvP. Before the change to sturdiness they were the best PvP race by far. I still think they hold that title, but its a lot closer now. They should still have the best burst DPS with the extra spell power.

Jungle Fever: Why not try something new and different? Use mixed races/sex and balance their differences! 2 orcs, 2 troll, 1 tauren.