Three aren't neccesary, or practical, but since you asked...

300 H&H Flanged Magnum at 7.5lbs, regulated with 220gr bullets, equiped with a 1.5x6 Schmidt&Bender with illuminated reticle in claw mounts, and I'd bring both softs and solids.

375 H&H Flanged Magnum at 8.5lbs, regulated with 300gr bullets, equiped with a 1.1x4 Scmidt&Bender with illuminated reticle, in claw mounts and I'd bring softs and solids.

450 NE 3 1/4" at 10.5lbs, regulated with 480gr bullets, express sights only, and again I'd bring softs and solids.

Given the real world restriction of two rifles, I would be eternally happy with the 375 and 450.

JPK