Well after reading the Children of the Horned Rat Sourcebook I see that Skaven are also used as Mercenaries (Clan Eshin assassins/Stormvermins/Skirmishers and even Clanrats can all become Mercenaries and have been used as mercenaries aparrently) mostly by morally ambiguous people. But the only other race besides Ogre that I can think of that is exotic but also not totally bonkers would be the Lizardmen (But I know nothing about them or if they're even not bonkers).
For the king, For the king, For the sake of Skyrim. For the Nine, for the hope of High Hrothgar's pass, and for all of Sovngarde; Where the souls sing your song. For the king, For our King, who will guard Hrothgar! Dovahkiin, Dovahkiin, naal ok zin los vahriin, wah dein vokul mahfaeraak ahst vaal!
Ahrk fin norok paal graan, fod nust hon zindro zaan, Dovahkiin, fah hin kogaan mu draal!