Idk if Chevy owns the gasser market. Don’t care to look it up, but there are a zillion PWFs with 6.2s out there. (Plain White Fords). Seems to be the rig of choice for construction companies and government agencies.
6.0/4.10/6speed Still does not tow as well as the competition though in my actual experience over the last 10 years or so.
Being in the career I am, I have the somewhat unique experience of being around, driving or being assigned MANY different light trucks in the western states and mountains, mostly gassers and after a couple recent years of mostly Chevys, 08-18 models, while they are good reliable trucks, they give up a bit of towing power to the 6.2 Fords. Haven’t really hooked up a 6.4 Ram to a big load, but save for the wonky lower gear splits, I’d expect the Hemi to out pull the other 2 at speed.