I have a couple of Manners EH2s and a Pro hunter. I also have a couple of McMillan game wardens. Take a look at a manners EH3. It might fit what you are looking for.
Here is my 300wsm 20.5" with a scythe ti. It is the same length as a 300wm would be with a 26" barrel and no can . It is a balance between performance and maneuverability.
I have an 2018 3.5 max tow. The truck tows great. With stock like summer tires I get 20-23 mpg and 12-14 towing my 20' glass boat. With my fall winter 275/70 10 plys I get 17-19. Had it since new, 91k and no problems.
I'll second the final rise. Grouse, pheasant, turkey, sporting clays, I use it a lot. Super comfortable even when loaded with a big tom in back. It is expensive, but it is super high quality.
A PP would be my vote. No shedding but a rough coat requires some work. A WPG or GWP/DD would also be good choices. They will hunt anything you want and mine is great in the house, with kids, other dogs, and riding in the car. My GSP is tough to beat for upland but doesn't enjoy the cold water.
Cleaning out the .277 bullets. Would be great if someone shot me an offer for the while pile but piecemeal is doable. Number of bullets is in green writing on the box. Sorry the lower right is nosler 130 etips.