Ahh...okay. Hmm...to do that in a FF film would be a remarkable achievement and would probably be a bit of a risk.
As for the original FF films, with the exception of Jessica Abla, you've got some fucking great actors in the mix already and it was great casting. The films went too family friendly and pantomime though. A reboot I'm actually quite intrigued by.
The Resident Evil films. I'm one of the reasons they keep making them.