To answer the question, in the larger metric sizes I predominantly use these Stahlwille No.23 “Corona” wrenches. Lovely tools. They have lasted well, very durable finish.
I also have a lot of these Hazet 600N combination wrenches. Again, lovely durable tools and no complaints, but I seldom need the open ends, so the Stahlwille’s remain my “go to”.
Some thoughts - I’m in the U.K. so these German tools are. very definitely “mid price” for me. More expensive than Taiwanese tools, but nowhere near Snap On money. Your “mid price” options may be different.
Bigger wrenches just don’t seem to wear the same way that smaller ones do, so while there’s every argument for having the best you can afford in the smaller sizes, you can go for something less costly in the larger ones without many compromises.
Buying used can be a good option. The larger sizes are costly new, don’t hold their value, but are seldom very worn. The downside that I find in the U.K. is that most used wrenches are in SAE sizes. I suspect the U.S. is similar.
Consider carefully the sizes you are buying. Some of the sizes you list (e.g 20mm) are not used by any standard. If you buy a wrench this size, I can pretty much guarantee you will never use it. You might be better off buying the popular sizes - 21, 22, 24, then adding a couple bigger still that you will actually use - say 27 and 30?
I don’t own any wrenches in non standard sizes and have never needed one. Only 20mm I ever encountered was on an adjustable reamer, and I used my pliers wrench!