Either a 7x57 with 140 grain NBT's, a .270 Win with 130 grain NBT's or a .30/06 with 150 grain NBT's.
I’d be in this camp. My 280 imp with 150 NBT’s close to 3K would be my go to. Anything between 6mm and 30 cal with a fairly stout C&C bullet around 2800-3K fps would be fine with me.
The following of a wounded cat may bring another choice on though!