Thinking about the next Tow Vehicle

Though I think the newer gas V6s (non-turbocharged) would do what you want, I think they would work hard. Just about any V8 (or equivalent power) truck would do well for you. I firmly believe Ram builds a lot of play into their numbers. Their GVWR is miles from their GAWR. My 2015 Ram with 5.7L V8 tows our 6000 - 6500 lb trailer with ease and stability under all conditions. And that's with various loads in the truck that are usually over the GVWR, but under GAWR.

I agree with the statement earlier that anything in the last 8 years or so would be adequate as long as you go by the manufacturers numbers and it's been well maintained.