Do you have any idea how impossible it is to find an animated GIF of a real (not cartoon) rhino charging at full speed online? I figured there'd be pages of 'em. None. :verysad The Internet is a failure.
At the end of day the most important thing is he has stamina and you definitely have that and be a bit chubby. Still I'd be interested to know what sort of nutrition\supplement regime he's on. I'm sure he could get leaner. Tyson had the same build and he managed to get cut. I reckon Chisora would be pretty lean at 235. At the very least it would make him more marketable.
I would imagine Chisora's best weight is between 235-240. I'd like to see him at a solid 17 stone dead on most fights (238lbs)