I would stick with a known good LT E tire line and know it to be recommended by the tire maker for trailer position use....and more importantly the tire has years and miles to back up a good service record.
Two commercial grade all steel carcass tires like the...
Michelin XPS Rib tire.
And the Bridgestone R238. Both are the holy grail in a 16" LT E.
Poly carcass tires;....
Firestone Transforce HT
Goodyear Wrangler HT
Cooper Discoverer HT 3
BFG Commercial T/A 2
These are LT tires that their mfg I (and others) have emails from their mfg stating they recommend them for trailer service.
I would stick with a LT225/75-16 tire at 29" diameter. Just be aware taller tires like the LT235/85-16 (32" dia) can have a negative affect on braking performance.