Hello,
I'm new to this forum and hopefully, new to the BKP family soon 
I have an Epiphone les Paul goth (FR), tuned to D standard or dropped C with SD Blackouts in it. It's been 10 years since I got it and now I find its high gain tone a bit too harsh, not that tight and not really in line with my current taste . It's a heavy mahogany body and neck, with a di sound a bit dark.
I'm considering moving back to passive pickups and I've heard great stuff about BKP. The question is, which BKP set would sit good in this guitar for a modern metal tone (in the likes of the Haunted, Haken, KSE. Rhythm and leads), able to deliver gnarly palm mutes but with enough clarity for some wide chords.
I've thought of the Ragnaroks but they don't seem that much defined (for exemple for open chords) and the Juggernauts seem great but I fear they might not be as gnarly for palm muting? Sadly, I've found very few videos of BKP on lespaul type guitars, so I'm concerned the reviews I've seen for superstrat models will be off in this case.
If you have any good suggestions, I would really appreciate it.
Thanks! 
P.S.: Is this particular guitar (I upgraded the pups afterwards): https://www.musiciansfriend.com/guitars/epiphone-goth-les-paul-studio-with-floyd-rose
Floyd Rose style bridges are interesting. Upgrading the bridge can add a lot of upper mid cut and tightness in the lows. Cheap metal absorbs vibration more so you end up with a lot more low mids and less detail in the highs. I mean you can even look into swapping out the saddles on the bridge as that alone would make a difference. Upgrading the block also helps A LOT.
Let's talk pickups: The Juggernauts are very responsive and aggressive pickups and they really are my favourite for cleans, rhythm, and leads. Now, I would not put them in a dark guitar. They excel in bright axes where they really phatten up the low mids and tame the brightness. The low end just pounds with these pickups and you get a really full range response. But in that Les Paul, you will likely hear a predominance of low mids and the top end just won't be present the way you would like. I say pass.
Gnarly mids: One pickup really has this in spades: Alnico Nailbomb. They are as tight as BKP are, and they have this hairy, throaty, grinding midrange. The high end is present but also warm, and there is a low end but it is not huge like with the Juggernauts. I'd say the A-Bomb is a very balanced pickup. This is a great option but I don't know if they'd be as tight as the other suggestions.
The Impulse seems like a great option too. Not sure on how gnarly the mids are but I expect they would have great control of low frequencies.
Aftermath: This is a brighter pickup which is similar to the Juggernaut, but the frequencies in general are more focused around the center mids, upper mids, and treble. This pickup is created with drop tuning in mind and I hear it is extremely precise and almost dry. Worth investigating. If it gets a LP to Superstrat + Juggernaut territory, it would be fantastic for what you are doing.