[quote=@Jbcool]
So, what have we got thus far? 

I see a couppla Astartes here, and a potential other few Inquisitors, anything else?


EDIT:


Righto, a question on two options.

Numero Uno - Would I be able to go with a Xenos, as part of a retinue (sanctioned xenos), such as a Kroot mercenary or such?

Numero Dos - An Officio Assassinorum representative, probably a Callidus Assassin?

Apart from that, I'd be happy to roll with another Inquisitor, if such is the Emperor's will.  
[/quote]

Why not have an inquisitor with an assassin and a sanctioned xenos in their retinue? I'd except either one though, separately, if that's how you wanted to go tho. Like Astartes, they would make interaction with regular imperials a bit tough- but I'll take w/e people want to run with and tailor the plot to it.