Crawlers aren't "metal pickups" as such, but I think work fabulously for heavy rock and many metal styles (particularly "classic" metal and doom/stoner type derivatives where clinically precise shredding isn't a priority). They are very much like a hot PAF/Mule, though they do have a bit of a mid-bump -- that I find handy for cutting through the mix -- which might make you think about something else if you're already worried about too much in the mids (as others have already noted).
I don't know much about the Cold Sweats, but you're already finding the Holy Divers a bit mid-heavy, then, mm yeah, the CSs might indeed be worth a look.