Not a "pipe dream" IME/IMHO but nothing being perfect in this world, the "simplest most effective solutions" have downsides.
It has been discussed in topics like this one:
https://www.mylespaul.com/threads/mu...pickup.477161/
Personally, I like to diminish the inductance of irremediably muddy neck PU's. And the first way to divide it (to 1/4 of its initial value) is... to wire a pickup in parallel.
If parallel wiring is too drastic, another way to lower the inductance is to put some inert LR circuit in parallel with the pickup. A choke / dummy coil plus a resistor do the job as long as the inductive / resistive values are right.
NOTE: the "humbucker from hell" is nothing else than a low inductance humbucker, not far from a Filter'Tron specs wise.
A real (vintage specs) VariTone can give really tight bass to a neck pickup in the last positions. But it requires a big beefy choke, difficult to find, and the circuit is not that simple to build / mount.
A Bill Lawrence Q filter properly implanted might work too, at least with powerful humbuckers.
All that being said... Les Paul or not, most of my guitars with neck humbuckers involve 50's wiring and give pleasing clean tones to my ears once the volume plus the tone set around 6,5/10: in this case, lowering the tone doesn't trim the treble, it widdens the bandwidth (counterintuitively, I know, but that's what happens).
Some people prefer treble bleed caps for a similar effect when the volume is lowered. That's not my case. YMMV.
Good luck in your quest.