There is no one best rifle or caliber. There are scores that will do the same job. It`s like dad told me, if everyone wanted the same woman the world would be in big trouble. Dead`s dead. Most rifles will kill everything. I own around 15 rifles. I only might need one. They are in 7x57, 30-30, 308, 30-06, 30-40, 300 H&H, .357 and .44 mag.
I have all the actions, bolt, lever, pump and semi auto. Scopes, peeps and open. If I had to I belive I could live with any one of em.
I like a "sweet heart" rifle. To me, thats a fairly light , low recoil, flat shooting rifle. While I have around a half dozzen with fine scopes, I really have come to respect peep sights. I hate fiberglass, stainless steel, camaflog paint, built in tripods and such. I like fine wood.
The most desireable asset in guns or anything else is reliability. Haveing a caliber that you can find ammo for is nice.
I own several very old winchester 70s. A browning safari. A browning auto in 30-06. A ruger 77 in 7x57. Remington pump in 30-06 with a peep.
A armfull of levers. While I have many more powerfull, accurate, exspendsive, collectables etc, you know what my first choice is?
I bought this winchester 94 30-30 when I was I think, 16 in 1957. It was my 1st centerfire. Paid about $60s for it new. Soon added a foolproof and a pad for LOP as I was a big kid. I have never had to change the zero in 55 years! I shot more deer with it than all the rest of my guns put together. (Thats not a fair statement as I havent deer hunted in the last 15 years or so, but still bought new rifles.)
I think my 1st choice as a kid was a good one.