Hmmm.
I look for toughness, Edge geometry, a handle that provides a secure comfortsble grip in about every position I can come up with.
I want it to have a good point that I can pierce with if needed and yet somewhat strong. Batoning is a requisite. The edge must be thin enough to cut efficiently preferably convex edge on a full flat ground blade.
I don't do a lot of prying with my blades though my large blades could easily take it. My M-43 kukri I did pry with once to break out a notch when building a trappers cabin and it flexed to over 30 degrees and returned to true. However my large blades are all 5160 which is a very tough steel.
Most of my knives have started as 1/4' or 3/8" thick material and been forged down to 3/16 or 1/4 inch thick at the ricasso, all with distal tapers which is helpful in makinfg the blade handle stress better.
However this is all due to my love of the forged blade.
In 40 years of practicing wilderness survival, and more hours of outdoor pursuits as well as using blades daily on the farm, including a farm kill truck. Prying has never been one of my practices with a knife. Except on a very few occasions so it isn't to me a real big concern.
Most blades 3/16 inch or so thick with a convex or full flat grind will work very well for most survival tasks. Some of m,y favorite production models are:
ESEE 4
Swamprat Ratmandu
Fallkniven F1 & S1
Himlayan Imports R-10 and M-43 kukri
And many more.
Personaly I prefer the carry of a large knife and a smaller knife or folder, and the practice of always carrying both blades on your person as opposed to in a pack.
I generaly take along either one of my 10" blades (all of which are customs)Busse and ESEE Knives both make some fine blades in this range. And a smaller blade (Ratmandu, ESEE4, R-10 etc.). Or my Kukri and a smaller blade.
The addition of a large blade makes the fabrication of shelter, amenities, and trap parts far quicker and easier. It could all be done with a smaller knife. It would just be a whole lot more work.