Buck 121.
Admitting that I have not handled their fixed blades that were introduced in the last few years, the 121, sometimes sold as the Fiserman, stands alone. It was the only fixed blade made from thin stock. That makes a 121 easier to sharpen, makes it the best slicer and makes it lighter. I'm not Rambo. I'm never going to stab my Buck into a crack in a vertical rock cliff then use it for the final step to safety and, of course, mowing down another hoard of bad guys to save the world. I prefer Buck's older full flap sheaths and black phenolic handles. Knives never fall out of those sheaths and the handles can be hand washed with the rest of the dishes. I've seen wives steal their hubby's 121 to use in the kitchen. After ward the hubbys could only borrow them back. I doubt you'll ever see that happen with the thick heavy sharpened pry bars that so many men buy.
Among the older 100 models runner up is the 102 Woodsman.