I'll say it again, I really liked the Cooper STT, The newer version I have not tried. Used the STT on my f350 and an f250 with no issues. They wear well, great traction, but are a little loud. Worse as they wear down.
I am using the BFG KM2 on our Toyota 4Runner. Can't say for a heavier load but they are TOUGH tires. Great sidewall, not as good on ice, better in mud, must rotate frequently.
My hunting truck is probably going to get a set of Interco TRXUS. They are 10 ply, sidewalls are crazy strong.
Interco TRXUS