Heh, I think Frederick fills that role pretty well in 4. And Louis could be his incompetent assistant. 
Hard to decide between Hetshepsut and Izzy for me. They both lose a couple points though, Isabella for being such an ass, and Hetshepsut for the fact that it looks like they chose to portray her when she came to power (age 14), which makes me feel really dirty. Honestly though, it's probably more the hat than does it for me (in a good way). Probably explains my undying affection for João too.

Hard to decide between Hetshepsut and Izzy for me. They both lose a couple points though, Isabella for being such an ass, and Hetshepsut for the fact that it looks like they chose to portray her when she came to power (age 14), which makes me feel really dirty. Honestly though, it's probably more the hat than does it for me (in a good way). Probably explains my undying affection for João too.
