^ Opinel for a few dollars very hard to beat as far as inconspicuous and high quality for low price goes. For something with a thicker blade ontario rat 1 is under $25 made in USA very good knife for the money. For a fixed Mora. For a multitool knife victorinox for plier multitool leatherman.
This sums it up perfectly. Ontario, Ka-bar, Buck, Becker, all have decent fixed blade, made in USA designs for reasonable $$$. I'm sure there are others as well. IMHO some things to look for: full tang, sheath ( it is often as important as the blade), length 3-4" is enough and will keep you out of trouble in
most locales.
If you are still considering a budget folder, the S&W assisted openings are fast and good for the price. And unlike autos, they are legal almost everywhere. Sadly, not made in USA though. I've lost high dollar knives before and it hurts. I've also had flea market junk fail when I needed it. S&W is one of several that fall into the sweet spot of capable blade that won't break your heart if you happen to lose it for some reason.
One other suggestion. Victorinox has several models (OH Trekker may be the most popular) of one hand opening knives via thumbhole. These still have most of the swiss army style tools as well. Looks less threatening and easier to explain as a tool instead of a weapon if asked. With practice they can still be opened quite quickly via the thumbhole.
Choosing a knife is a very personal decision. Good luck with your search.