I was looking for the same description you gave for my '73 lp custom
after trying a lot of pickups in this guitar (nailbombs, cold sweats, holy diver, aftermath, black dog and a motor city set), I ended up with a mule on the neck and a custom riff raff on the bridge (it has a thicker magnet)
I use a heavily modded '73 marshall jmp that's very bass heavy and gainy, a lot like an orange but more open, a bit bognerish maybe
if you have a booster for the heaviest stuff, you won't miss high output pickups at all
with my other amp, I don't even need one, but I like setting the amp gain very low, as I never use actual clean channels, so the boosters get very useful