bulldog563
Hard to say what is "ideal". However, a model 70 or mauser in 270, 7mm mag or 7X64 would be my choice as "small bore". 375H&H will do fine for all the larger North American animals and African game. "My" small bore would work well as goat, sheep, deer and pronghorns rifle in NA.

What type of action/brand of rifle(s) are you considering?

Cheers
/Johan