So much depends upon the mission profile.
In a true "survival' situation - you may not be moving, or be able to move. A large heavy chopper would be fine, provided you do not have to carry it.
If you want a knife that can chop and perhaps pry but is portable over distance and terrain, now you start getting into compromises and design. A knife that is a sharpened pry bar that can chop may not be the best for more delicate work. I do not believe that there exists a knife that truly does it all. For this reason, I prefer the two or three knife approach: a heavy chopper, a smaller knife - perhaps a folder and a delicate SAK type of deal.
Assuming your thread directed itself tot he first category, choices abound and are mostly dictated by price/budget, brand loyalty and materials ( prefer carbon steels in field fixed blades). Arguments, disagreements can surely follow as with discussions about Chevy versus Ford (get the Ram), blondes versus redheads versus brunettes and which bourbon (ah, Tennessee whiskey) is best.
Busse and Becker are good choices unless you are looking for a slight compromise is design whereby you want a sharp cutting knife as well as a rugged chopper, in which case I am partial to the Chris Reeve's fixed blades, the "Project" series of A2 and the newer SS models. There are many, many choices. A modesty priced 1095 fixed blade with a decent heat treat can serve you very well; but then again, a Saturn car or 2WD Ranger could serve most of our transportation needs but we don't all drive them. That's what makes this enjoyable.
Happy Hunting!