The loading screens for Crusader Kings 2 is pretty good looking.
The ones for the Elder Kings mod (based off the Elder Scrolls series) is even better and looks right up your alley.
The art for CK2 is by Aleks Molchanov: http://imgur.com/a/MWrYQ
I'm not sure who did the art for Elder Kings, if it even was one person: http://imgur.com/a/gmlKT
The one who posts the EK art on the Paradox Interactive forums goes by saffronmar but, that might just be the guy who posts it and doesn't draw it.
Link to the Elder Kings subforum on the CK2 forums:
