Assuming handgun only:
A lightly used S&W 28 with a 4" barrel in .357 Magnum and a lightly used Springfield 1911A1 GI in .45ACP. I think I could fit those in if I shopped carefully. To me these are the ultimate "cover it all" guns. With the right loads the .357 Magnum can take down deer and similar game, the .45ACP cartridge will potentially work on the same, and the .357 can use shot-shells to take small game or kill pests. I wouldn't want to bet my life on either, especially the shot-shells, but if I had to make it work I think I could. The 1911A1 is my favorite handgun, love the feel of it. With work, and some rolls of fat, both can be concealed, though the 1911A1 is the only one feasible for every-day carry.
The 1911A1 is the packer, the fighter, and the backup food gun. The .357 is for practice(with .38s, and the hefty weight, it would be light recoiling and cheap), is no slouch in the gunfighting area, could be concealed, and would be a good hunting gun/backup hunting gun. As an added bonus they are both beautiful guns. And if you can help it, why live with ugly guns? Life is short, use somethin' classy. A .22lr would be useful for many things if I could add that in. Now, if you include longarms... whew boy.