Really depends on if you mean in PvE or PvP, but for PvE:

Protection paladin: 10
Arcane mage: 10 (best dps in heroics, best cc)
Elemental shaman: 10 (best utility)
Marksman hunter: 9 (dps is easy to macro, but loses a due to melee range)
Unholy DK: 9
Holy priest: 9
Rogue: 5-6
Shadowpriest: 5-6
Balance druid: 5 (have to micro eclipse procs)