If the question what is the ultimate and only knife, then probably, it is going to be my Busse BA3. But dont think I will tell a lot of good things about it. I like the knife, but it is, like many multi-purpose knives, does all the jobs, but either not comfortably, or very slowly. You try to obtain the best proportion between the length and weight, but something is difficult to combine. Plus, it is an expensive knife.
I have a few knives, but each for its own purpose and I think as a package they work better than Busse: Spyderco Delica just to have something always with me, Tramontina Sports knife for cooking (it has thin long curved pointed blade with a place to put my thumb, therefore it is comfortable to skin small animals, gut fish, peel and cut vegetables, this way it became my favourite for all travels), Muela Skinner for skinning, Victorinox SwissChamp and some Chinese multi-tool as tools (never used Chinese tool yet) and Victorinox Picnicker as peeling and carving knife. Busse is used as a chopping instrument, but so far it chops bones in the kitchen only, I did not have any need in its toughness while I was camping (I would not consider preparation of food as a good indicator because Tramontina does it better)..
Regards,