Depends on the tire. A BFG MT in that size I'd say no, because BFG tires run small and only give you about 7.5" of tread width in that size. On the other hand, a tire like the Kenda MT will have 8.25" of tread width in that size and wouldn't look too terrible on a fat 9" wheel. So the AT options in that size will all fall somewhere in between. Just depends on the tire.
The rule of thumb is that you want the TREAD width, not section width, the tread width to be equal to or slightly greater than the listed wheel width for the best wear, looks, and performance.