I personally don't think there is one ultimate rifle, each one I own, except for one or two nostalgia rifles, has it purpose. I prefer bolt actions but do own a sporting semi-auto in case it is ever needed, I have shot it and am proficient in its use so I can bring it into action should that need arise. I also have a 9mm PCC that I can use along with pistols and revolvers for home defense.
For me, I consider long range at 1000 yards (the length of our local range) savage BA Stealth in 6.5, mid range, Howa 1500 Varmint in .223 with 69 grain bullets, for closer range, Ruger precision in 22 mag and for those days when I want to shoot closer still a Savage BTVSS in .22lr. all these have scopes and I use them for putting holes in paper or ringing steel. I also love my Marlin 30-30 lever for all around use and have used it hunting deer (I suspect a lot of folks have).
I don't want to forget the black powder rifles and revolvers for fun days of just blowing some smoke and seeing what I can still hit with open sights.
I also don't believe their is one Shotgun that is the best, although you could say a 12 or 20 gauge pump is pretty universal. I have singles, pumps and O/Us from .410 to 12 and again, each has its own place in what I like to do.
To each his own, and I know it is just my opinion, but, I would rather have a dedicated tool for the task at hand than a crescent wrench for everything.
D