well tough as they staying as portraits

, [anywho the immersion may still be kept, portraits who look like priests will be priests, others who look like civilians will be diplomats/merchants. Those which look shifty will be spy/assassins. So you won't have somone who looks like a catholic priest being a general for example.
if we did that we would have almost no portraits left since nearly all of them are like that. With the exception of the mongols/byzantines
Then I would ahve wasted numerous hours of my life selecting which portraits, cropping them. converting them and numbering them '001,002,003' etc. P