If you should be asking for crazy I might be able throw in an idea. Disclaimer: I have not played these pickups, I am just going by information gathered here (, so this is just a mindplay of me).
I am thinking getting the HHH to be a HSH layout with the middle being a P90 to add that different flavour and increase versatility.
Nailbomb bridge, HS Pig 90 middle, Holydiver neck.
This is a bit of a strange combination, but my thinking is: NB bridge is very versatile and can do metal to rock, I think great for stoner. Then you rightly mentioned the Warpig (would be a great bridge choice too), but I was thinking to put it in the middle to get a lot of versatility out of it and great combinations with the other PUs. If you could get a HS Pig 90 it would be cool too, cause it gets a great aditional vibe which should fit stoner nicely imho (donīt know if I would put a normal WP there). The holydiver neck should round the whole thing up as it is supposed to be a great neck in general and should fit with the others in a way while still giving nice contrast.
This would be my idea of a versatile stoner guitar.
Again, I am a madman, which has been proven time and time again, so take this with a grain of salt...actually you should probably take the whole shaker. This is just what I would be very interrested in doing and most of the other folks here would rightfully disagree with me.