The Stormy Monday is smooth and sweet sounding, but I wouldn't call it dark. It's not a fat, thick sound. Gary Moore used the PG Blues on occasion, but for us mere mortals something slightly hotter probably helps.
I think you should definitely look at the AIV PAF-ish neck pickups like the Mule, Crawler, maybe Abraxas. I haven't tried the Black Dog neck, I've heard it's pretty fat but maybe with the AV magnet it's a bit tougher/more aggressive sounding?
Don't rule out the Emerald neck, our man Nolly knows his stuff! :)