I can’t believe I forgot - It’s been a while but does everyone remember Choice of the Dragon 
I remember a read through where all the goblins served you as the first of many minions. Can’t be sure but couldn’t you rule over the humans as well?
Not the Of beasts and humans (Short Demo is Out!) - #277 by Prof_Chaos
type of rule. . .
I guess the dragon was parasitic in that example. Personally I’m tending towards the
https://dl.dropboxusercontent.com/u/47183494/pics%20charles/4.jpg
relationship at the moment.