There are so many options here I'm not going to add but as it happens I'm reworking my Gibby SG with Jazz/Custom, I keep coming back to this set. They are not vintage PAF but then not super modern either and working the knobs will get you nice things. Might be able to deal out my stock set cheap but I don't really like them.
I’d put ‘57 classics in it or the set that comes in Gibson sg standards. Rewire it with a good switch and 500k pots too. Before doing anything play it kind of a lot and Ask yourself what you wish it sounded like compared to what it sounds like, figure out what’s in it now and make an appropriate choice.