Please stay away from Nailbomb, you`ll thank me later. This pickup will definitely NOT give you what you want. I used to have Ceramic version and although I used 9 different BKPs, Nailbomb was always black sheep, never liked it so much and ended up selling it.
But let me explain why Nailbom will not tick your boxes.
First of all even ceramic version that I had never coped that well with lower tunings, due to its hairy and raspy nature it`s not precise enough for complex riffing especially on lover tunings. Clarity in my opinion is opposite to Nailbomb, especially clarity in large chords is not achieved very easily with Nailbomb. You`ve mentioned lead tone... Ant it`s the weakest point in Naibomb, as many will agree with me it`s not lead pickup at all. Maybe alnico version will perform better but generally speaking Nailbombs are not for leads at all.
I don`t know Black Dog that much so I would let anyone else with any experience to speak about this pickup.
My suggestion would be Miracle Man. It`s my favorite pickup of all time adn I know BKP line quite a bit as all my 4 guitars have only BKPs (look at the list below my post). I like Miracle Man to that point that I have it 2 guitars :)
But to the point. I think it will tick all of your boxes especially in the guitar like yours.
-thick bottom end, really chewy as I say,
-balanced mids, slightly scooped in mids
-lovely highs, slightly pronounced but in healthy and tasty way (same as bottom end)
-has amazing clarity
-quite versatile, can be metal pickup but can play modern heavy blues with dignity as well (I use MM for different styles and I`m always happy)
-good cleans (modern sounding) for ceramic pickup
-PLUS amazing lead tone, I mean it
The whole set is amazing to be honest, not only bridge. I really like middle position on cleans to. Regarding neck model is shares similar vibe as bridge, great for cleans and solos.
Many people say that Miracle Man sounds like Zakk Wylde. I woud say that bridge model does not that much, but neck Miracle Man reminds me a little bit of Zakk neck tone,
Summing up, I have 4 guitars with different BKPs but 90% of time I only use those ones with Miracle Man. Really. I think that it will tick all of your boxes.
Although I don`t know Black Dog.
hope it helps.
Lucas