Best for what?

Quick shots in the thick woods then the 7-30 Waters or the 7mm Mauser would probably be the best.

All around 7mm that would cover hunting in thick woods to relatively long shots up to 350 - 400 yards then I would pick the 7mm-08 or the 280 Remington.

Regularly shooting at animals beyond 500 yards then I would opt for a 7mm STW or Remington ultra mag.