.17 Rem, .204 Ruger, and 375 H&H
The 375 is pretty diverse - the bigger the cartridge the more diverse they are. Rabbits and above can be taken with the 375.
Not saying it can't kill a lot of things. I just don't care to pay the price to shoot things not needing the power of the .375. I also don't care to hump around a rifle that weights that much when not needed for the task at hand.
My picks were based on what I shoot and how much I shoot them. Your mileage may vary!