Probably an F250 or F350. One big detractor on the Fords is that I don't like the local Ford dealers service department. Also, I see intermittent reports about the electronics acting glitchy when a plow is hooked up, even with the plow prep.
The GM's had really uncomfortable seats imo when I drove a 2020 Silverado 2500 Custom and a pretty well optioned 2020 GMC 2500 SLT. The Ford was pretty comfy, has a huge back seat, but you have to move through a few option packages to get rear ac vents on the console so it made it pricier than I was willing to spend. The Ram Tradesman has rear hvac vents on the console in my Tradesman, so that was nice. I feel like the 7.3 has good power and people really like it, but the reports so far that I see say that it's more of a drinker than the Ram 6.4, which isn't unreasonable being 7.3 vs 6.4, but I don't NEED the extra power, so why pay more for gas than I already do.