110gr @ 3450fps
to
220gr @ 2600fps
That should pretty much cover most things you might want to do in North America. Are other choices better at particular things? Sure. But finding a more well rounded cartridge would be challenging.
Using 30-06 brass, you can neck up or down for even more flexibility
25-06 (75gr Vmax)
6.5-06 A-Square
270
280
338-06 A-Square
35 Whelen
375 Whelen Improved (350gr TSX)
A 3 rifle collection of 25-06, 30-06, and 35 Whelen would probably take care of 99% of what 99% of us would ever want to do.....or at least what I would want to do