Kabar Dozier folding hunter models are slim, light, inexpensive, hunter OJ, and do the job. I've not found a situation that this 20$ blade couldn't handle (edc/trade type job). IMO, good place to start.
i know that this is a gun forum...but i carry a knife on me more often than a gun...(if i have the gun i also have the knife..but i almost always have the knife....much more utilitarian than a gun....though you can open beer bottles with the ejectionport of most handguns i dont recommend this...beer is sticky...and handling guns while drinking beer is not recommended)
Spyderco endura 4 left pocket of pants for edc,
browning fixed blade and leatherman in my edc backpack,
glock field knife ON my go/get home/72 hour bag.
Sometimes blackhawk sxf punch dagger carried on necklace but find that can be pulled from sheath with not too much effort. It doesn't hold up well to the rigors of industrial work so I leave at home most the time and forget about it.