Have you looked at Nissan's Titan XD ?
They are bigger than the 1/2 ton regular Titan, but smaller than 3/4 tons, from the big 3. I don't know if they are still offering it, but, my 2018 came with 5 year, 100 thousand miles bumper to bumper, and lifetime power train warranty.
I have an SV, crewcab, 4X4, 5.6 gas, with utility, towing, and convenience packages. The payload listed on my tire / loading sticker is 2098. A 2 wheel drive model would have about two hundred pounds more.
Note: Whatever make /model you choose, the payloads go up, as the number of installed options go down. I have talked with Titan XD owners who have the diesel engine (heavier than gas engine) along with same options as I do. Their payloads are 250 lbs less than mine.