280 in Africa
The zebra is the toughest of the game on your wish list but a well placed 280 bullet will do the job quite well.
I have used 160 grain Nosler Partitions, 160 grain Nosler AccuBond, and 160 grain Barnes TSX on all of your list. I did not like the 160 TSX performance and would switch to the 150 grain or 160 grain TTSX if I use Barnes bullets in a 280 again in for gemsbuck and the like. The TSX 160 had a bit of an expansion problem on one kudu although it did the job.
This year I will use a TTSX in a .30-06 as my light rifle for a Botswana hunt. If you can kill it with a .30-06 you can kill it with a .280.
Last edited by Big Uncle; 11-26-2018 at 03:23 PM.