Hi and welcome mate!
Well for an SG playing through Marshalls doing rock to heavy rock with great gain handlin capabilities....I really canīt help but think Riff Raff. After all it is THE SG pickup, can go pretty darn high gain and well SG + Marshall...what more can I say.
With the BD I would be scared of an overbearing midrange. With the emerald the bridge could work nicely, but the neck might get a hint too smooth. Plus there is the rule of thumb to either go vintage or high output with an SG.
If it does not collide with your taste or style in a way I am unaware of I really canīt see you going wrong with the Riff Raff.
Actually that or the MQ HSP90 for that matter, as those also rock in SGs like there is no tomorrow. So if you like the P90 idea those all the way.