Shaman

[Hroth]

Look at the evidence -

Klubba, troll, won shaman BotB

Svenn, barbarian, tops the list of the solo challenge thread

Conclusion, race doesn't really matter. Ogre frontal stun immunity is not a god mode defensive trait. In very rare instances could it possibly save you, sure, but then having the extra regen of a troll/iksar during a long fight could be what saves you too.

Pick whatever you think looks best. For me, that was troll.