As far as "one for all ", You can't get any more "one for all" than a 30-06. If you're concerned about shooting deer at close range with irons, put a lower power scope on it. I think most people are over-scoped. I used to hunt with the standard issue 3x9 scope. Since I went to a 1.5x4.5. I've shot deer at 5 to over 200 yds with that scope and never used the iron sights on it.
Rifles seem to be manufactured for accuracy these days. I am a bolt guy, but I have owned lever actions and a single shot that will group with any hunting bolt gun. You action preference is your own.