Cold Steel Pocket Bushman.
If Wilkins Ryback (with thickness of 4mm) is a kitchen knife then Spyderco Military and Cold Steel Bushman are kitchen knives too.I use my spyderco military for everything including food prep and it works great. It has a long wide ffg blade that comes to a fine point, it almost looks like a shrunken chefs knife.

Again it's too thick (3.5mm) + it's a dedicated chopper(not slicer)Check out the Blade-Tech ULU. That is made for kitchen use and locks in two distinct ways depending on the task at hand.
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