OK, I didn't click that it already had humbucker size slots
An alnico Warpig won't be exactly 'contemporary'. It tends to to give a very big tone with a full midrange, and quite articulate but rather overdriven 'clean' sound. I think it is perfect for Masters of Reality era Black Sabbath, doom metal in general, and the more dirty and gnarly sounding death metal such Machetazo. Of course this might reflect the guitar I had it in, which was quite dark (an Explorer). In general that pickup tends to be more versatile in a brighter guitar. Of course I can't tell how bright or dark your guitar might be without actually hearing it but I'd say it would have to be much brighter than my Explorer. It would probably work out well.
If you want a tighter death metal sound I'd suggest a Warpig with the ceramic magnet, or a Miracle Man.
If you want a more 'crossover' sound (e.g., RPD, Sepultura) or a '90s metal sound (e.g., Machine Head) try the alnico version of the Nailbomb.
The ceramic version of the Nailbomb does a nice thrash sound, and is good for stuff like Slayer.
Painkiller is even middier than the A-Bomb and might be too much for you. It is very nice in a heavy mahogany guitar though. Aftermath might be similar.
The Cold Sweat is very tight and articulate, with a scooped sound. I have one in my SG and really like it for most kinds of metal and rock. For death metal though the Miracle Man is a bigger, darker version of the CS.
I'd probably avoid the Rebel Yell. Good chance that it is too bright with not enough bass for your guitar.
Don't discount the Stockholm P-90 set. I have the bridge pickup in my SG Junior and it is a very heavy sounding pickup, though I think it is much more hardcore in tone than metal. Depends on what you want
There are also the Black Hawks. I don't know much about them except for the fact that they are a passive replacement for EMG 81/85 in some sense. If that's the case though your wood might be too bright.
The VHII is also good for metal and should combine well with your woods. If you were considering the RY I would probably suggest the VHII as an alternative.