Several of my pals are big, free-range, grain-fed prairie boys in the 6-3 to 6-6 foot tall range that I've had to drive around over the years and I note that they have to fuss to find cars that they actually fit in. In general, mid-sized Japanese sedans with a sunroof could be a challenge while VW seats seem to lower and move rearward adequately for the overgrown...at least that's what they tell me.
I think fit is your number 1 concern.