What would be your starting 4 if you got the choice of just non-marines?

I know it wouldn't exactly work lore wise, but for gameplay it would be a huge breath of fresh air if there was an alternative starting scenario like this. Having the Jingwei and Merc SLs as your starting choices would necessitate a different playstyle(no uber Darby for example) and allow more of a spotlight for those forces.

I'd probably go Exconde, Greif, Jean Sy and Yaz.