One modest fixed blade, around four inches, full tang, with a drop point and a sturdy sheath. That single knife covers food prep, cordage, feather sticks and general camp work. Add a folding saw before you add a bigger knife, because a saw does what an oversized blade cannot.
Four inches handles food prep and detail work while still being long enough for feather sticks and light splitting. A full tang means no weak point in the handle if the knife gets levered or batoned.
A drop point is the right profile: strong tip, useful belly, point in your line of sight.
Toughness and easy field sharpening beat maximum edge retention. 420HC and 14C28N both suit camp work well, and both come back on a basic stone.
A square spine is worth looking for if you use a ferro rod.
A folding saw. It cuts wood faster, more safely and with far less effort than any knife, and it removes the temptation to buy a blade too large for everything else.
Then a small sharpener. See fixed blade versus folder for camping.