I'd try either the miracle man or the aftermath.
They arent very similar pickups, but I'm basing the suggestions on the rhythm only proviso, the styles youre after and the largely mahogany guitar tuned to E/Eb. Those pickups will mesh with the guitars low end in a fashion that brings out plenty of thickness and thunk in palm mutes, lots of definition in the top end and sound thick (in mahogany) in standard tuning, or close to it. They'll also keep a 'cap' on the low end if the guitars lows are overbearing (the AM more so than the MM in that respect)
I agree that so long as the guitars pretty well balanced sonically, your best shot at melodic/power metals thick low end and cutting high mids is the miracle man. If youre worried about the guitars low end being to forward go for the aftermath instead; it will control it better.
Were the guitar brighter I would go for c-bomb or c-pig, which tend to force more low end onto a bright guitars sound, in my experience (whereas the AM and MM will let a bright/more mid-heavy guitar guitar be very bright/mid heavy amped up).