You are right the class C on Ford Chassis are plagued with handling problems some worse than others and some not at all. It seems that some need a lot of work and others not so much.
I would suggest that you try driving one in your size range on a Chevy Chassis, they are not prone to the handling issues that the Fords have or the $ to correct the problems. The Chevy Chassis doesn't have to be modified to improve the handling or ride.
Not to start a war but just to give you some options while looking.
The link in my signature about Chevy Chassis may be helpful.
Good luck and I hope that this helps in your search.