Mass-produced? Victorinox and Spyderco.
Smaller company? Bark River Knife & Tool. Some of their earlier models. Convex-ground A-2 cryo-treated blades you can strop back to hair-splitting sharp on a piece of cardboard or the leg of a pair of jeans, though they will rarely need it. Incredible cutters with fine balance, virtually indestructible. Mine have canvas Micarta handles.
In recent years they've been cranking out new models galore--too many, I think--and collectors are acquiring them. But the ones I've owned are superb working fixed-blades.
"Don't let macho be your epitaph."