Does anyone know if it's possible to get an assassin to take out anyone other than the general in a stack?

For instance the Danes often have one big stack with the king as general and several princes beneath him. I'd like to send the inquisitors in but standard inquisitors don't cut the mustard with Kings but can do a nice Prince mixed grill. Is there anyway of getting at them if they belong in the same army as dad?

I'm not sure but I also think that the AI can take out more lowly generals in your stack. Has anyone else witnessed this or is it the gin monkey climbing in my eyes?