I can recommend all of the brands here except QSP. I'm only one guy but I've had an absurdly high lemon rate from QSP.
I spoke a bit about Chinese D2 in my last post. Petrified Fish is easily the best bang for the buck in that steel. The PF818 has remained a "best buy" among budget knives since it came out. My only real complaint with Petrified Fish is that they tend to have crisp scale edges. Not everyone cares about that sort of thing and not everyone seems to notice. I tend to round scale edges on lots of knives though.

A more substantial upgrade I did to my 818 was a $12 set of Skiff bearings. The action was already good. Skiff bearings just take it to the next level, generally improving the balance between good action and solid lock-up. (Aside from high quality, they run more balls in a sturdier cage for greater stability.)
The Sencut Neches was actually my favorite knife of 2022. It is a fairly basic design but they just nail it for what it is. The action is good, it feels great in hand, and I love the blade shape. 10Cr15CoMov is effectively VG-10 and that's a solid value at around $45. (Of course, this is another one I liked enough for a Skiff bearing upgrade.) Forgive me if I missed it, but why the aversion to Micarta?