I use nothing but a havalon piranta to take a deer (or anything else, including moose) from being whole to completely skinned, quartered and broken down.. At times I will also carry a Wyoming Saw or a Gränsfors Bruk outdoor axe, for taking off skull plates.
I may as well sell my other knives, but old habits die hard so I still carry a sturdy fixed blade in my pack. I haven't used it in years though.
