it's time to be a dick time. I 'm not sure Hamil is this kind of master of many voices that would be required to carry a whole show. you have a few very distinct voices but then alot of ones where you rely on effects to create variation. its almost like "okay I can pitch down my voice for effect. lets see, he can be a black stereo type kinda character". have you considered widening the cast to take some of the burden of generating new characters/voice styles? other wise you would have to have the voice proficciency of say, a Paul F. Tompkins to pull something like this off.