Warpig.
If you want the cleans organic, get the AV pig.
If your main aim is to destroy everything in a 100 yard radius when you hammer out palm muted E's, get the C-pig.
From your description, I think you want the C-Pig

I have never heard of those bands you mention, but they sound like the sorts of outfits that will play a lot of down tuned stuff - which the Warpig loves. The Painkiller is an option for you too, it loves down tuned metal too - the PK is more upper mid focused than the Warpig, which is heavy on the bass and grinding low mids. Maybe something to think about there in terms of the distorted sound you are after.
But for "the tightest, highest gain pickup": C-Pig.