I don't use any Magnums anymore, thou there maybe a 7saum LR rifle in the future.
When I could handle the recoil, there was little I didn't do with a 300wby. Excellent choice for everything right up to the ones that will stomp you. The bitey ones are handled quite well with it.
I have spent more than a little time with the .375H&H as well. Truly the best "One Gun" if heavy came is a going concern as well as do to the size for the pot.
Of the stoppers I pretty much settled, thou it is hardly "settling", on the 458Lott in a bolt and the 450NE in a double.

300wby
375H&H
458Lott...............would surely do all that is needed to do.

now-a-days I use a .22, .240, .256 and my cannon is a 8x54KJ