"First of all, what I want is a very clean, but dark pickup, one that is tight, but open, not so cutting as to be thin, and not so thick as to lose clarity. I'd like something that has a midrange voicing like a wah cocked ever-so-slightly, a high end that is crisp, but understated, and a bell-like low-end."
Crisp high end, bell like low end, clean, tight, wah like, and open are not words to describe a pickup with a dark voice. The reason for the controversey on this thread is because what you are describing is a tone that is contradictory. Hotel California mixed with that kind of metal? A2 pro mixed with the black winter? Tight and focused but dynamic and open? These are contradictions. It's asking a whole lot from a pickup man. A full shred with an uoa5 would be too thin? A wah like voiced pickup that is open, tight and clean is the full shred and the uoa5 or a2 would add warmth and make it generally cleaner more dynamic, less cutting and darker. Pickups with the wah like tone are like the alt 8, the full shred, the emg 81, the jb, hotter pickups with a midrange bump, it also makes the sound tighter but the tightness comes from the compression and that would take away the dynamics and the open tone you want. You can try the custom shop I guess but going to them to make this kind of pickup would be like going to a fine bakery to get a cupcake that has the crunch and taste of flaming hot cheetos. Maybe I'm falling off the mark again but so far I have like 2-3 full paragraphs and 2 videos describing the tone you want out of these pickups and it's just not adding up to me.