There are two Goblins in the prison cell from Dragonreach, they will follow and fight on your side.
I have tried to make it similar with the Heroes 3 Hobgoblins, I have used the Vanilla HighElf race for that.
There are from my Beta project Necromancer Warzones
http://www.youtube.com/watch?v=3IAD_oVuyeg
Where you can Fight against Might and Magic encounter, Heroes and more.