Thrash and blues don't really go together that well ...
I would say though that your choices would be Cold Sweat, Nailbomb, or Miracle Man. Any of those can definitely do thrash. It just depends on specifically what flavour you want and what else you want it to be able to do. Out of those the alnico version of the Nailbomb could be the best for blues. You might also want to consider the alnico version of the Warpig.
Out of those I suspect the Miracle Man would be best for thrash and drop D.