Knife companies.
Well, I want to say Benchmade or Spyderco.
BUT...
Overall?
2 companies come to mind
1. Kai Cutlery, which makes the Kershaw line, incredibly high quality kitchen cutlery in a wide variety, and all kinds of medical cutlery like precision scapels, etc. A huge Japanese company in Seki City that goes back something like 700 years.
2. Ontario Knives up in Franklinville NY, which not only makes all the great Ontario knives - military and others, but also Queen, Schatt & Morgan - (are there nicer production slipjoints?), Old Hickory carbon steel kitchen cutlery with 1095, plus they do private label stuff, they used to make the Winchester slipjoints for Blue Grass under license, I think Moore Maker too...
So because of the definitions in the original post, I'll say Ontario Knives as the "best" overall knife company; even though I really don't think there is a true best because the industry is too fragmented
Meaning - looking for example at Spydercos like the Millie or Chinook or Manix - - no one else is making them!! So for some people, the fact that they make those knives, plus their great customer service, innovation, etc. - Spyderco might be the best knife company.
But overall? Good question.