If you want good on and offroad tires, duratracs or KO2s. If you're looking for strictly mud tires then I'm not sure.
as far as wideness, I run 315/70/r17s with no issues of cupping.
Most people run that size as well. 35 x 12.5 seems to be fairly common.
Second that. With a narrow wheel you can run lower tire pressure and your tires will not cup. Best way to find your correct tire pressure is to perform the chalk test.
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08 2dr Sahara
17 Gobi Recon