7-08
35 whelen
338 win mag
416 remington/ or rigby
470 nitro

or if you aren't into big game:

22/250
30/30
35 whelen
300 weatherby
416 remington/ or rigby

My position is that you could hunt the world and anything as small as gophers with a 416 or 375 H&H. I prefer the 416, but both are big enough for anything, shoot flat enough out to two hundred yards, and neither really tares up meat upon impact due to their relatively slow moving slugs. You could also probably kill anything with a 300 weatherby if you were a good enough shot and didn't mind meat damage on the small stuff (some legal issues on DG in some African countries). From my perspective however, I will always go with more gun than is necessary and a bullet that is heavier as opposed to faster. A good 416 remy with a 1.5X 5 scope could hunt the planet.