I'm assuming we are going from today, as opposed to what a guy shoulda, coulda done back then.
Hunting
22x57 30° 1in8 (224 Clark) - Seekins PH3 (switchbarrel)
375 Ruger
475 Linebaugh
12g Beretta (A400 or A800)
5.7x28 Ruger pistol
22x57 - can be thought of as a modernized 220 Swift (rimless), and handles 80s very well. Modern copper rose or hammer hunter for food, and sintered frangibles for fur retention. Seekins PH3 because it hunts well, switchbarrel, and can be used for competition.
375 Ruger - just works (220g Stone Hammers match 300WM ballistics) through 350gr solids. Insert 375 H&H here if you just can't stand it. Something Cerakoted and synthetic. DG, plains, or boat gun in one package.
475 Linebaugh - practical, packable
12g Beretta - Ptarmigin to geese to turkeys to coyotes - pick the right load and go
5.7x28 in Ruger 5.7 - Least expected choice. 22LR/WMR are just to light when dispatching wolves, wolverines, and badgers. Easy to shoot Ptarmigin due to a flat trajectory <100. Working man sled gun. Very unsexy.
Not much this lineup can't do, which is probably why this is pretty much were I've ended up after going through a ton of stuff that didn't. If I was back in my 20s, the Seekins would have had to have been something else, and the 375 Ruger would have been an H&H. 5.7x28 may have been 22 Improved Jet or 256 Win in a Blackhawk.
Collection:
Ultralight sheep rifle
Savage 99 284
Heym Express 416 Rigby
Heym 89B 470NE
Competition stuff not included here as that would be another book entirely.