FWIW I've never thought that the typical bass, mid, treble references were adequate for describing pickups. I really think you'd need AT LEAST six bands of eq AND a relative scale to known pickups if "I" were going to get my head around what it might sound like. But again, try that with Jhonny Rocker in his living room studio playing into a POD, Sansamp or Line 6. The typical demographic for these products gets confused when you say things like "upper midrange", "higher treble frequencies" or any expression that uses the abbreviation Hz. As a result I don't think there's going to be much outside of what people (likely people here on this forum) that own spectrum analyzers and such have tested for themselves. It'll be a small list. If "I" owned a spectrum analyzer and tested every pickup I've used in my life it would be a small list. But I'm an amp guy and not a pickup guy. But my point is that it's a tall order. Though like you I wish it weren't.