I use Riff Raffs in my SG, and my tastes are roughly like yours.
A lot of the time I noodle around playing blues stuff with it. My main guitars are strats, and that's really where my heart is... but I do love my SG for a bit of humbuckery.
I went for the Riff Raffs for the "70s classic rock" tone - and they do that nicely, but they also clean up nice when you use the volume and tone on the guitar...
And I very rarely play any AC/DC riffs nowadays :lol:
I think your other option might be Stormy Mondays, or the the PG blues set if you want that out-of-phase Peter Green thing going (I understand the two sets are quite similar otherwise).
I've not tried the Stormies, but I am quite interested in them. I believe the name is referencing the Allman Brothers guitar tones from around the "Live at the Fillmore East" time.
I have to say though, my Riff Raff'd SG is doing pretty good impersonations of that sort of tone anyway. HOWEVER... my SG is quite a warm sounding one, and I'm using paper-in-oil capacitors on the tone controls, which take some of the edge off and make the guitar sound more "vintage". The guitar my Riff Raffs were originally in was quite "hard" sounding, they were still very nice, but not quite as organic as I've ended up with now.
Unless it's a really bright guitar, I don't think you'll go far wrong with Riff Raffs - they just sound like "what a humbucker should" to someone with tastes like yours and mine. The minute I installed mine in the original guitar (they were my first BKP set), I went "Oh yes... :D"
Leg-length... hmmm... It's ages since I bought humbuckers, I think it's short leg you want - but check with someone who knows what they're talking about!
And welcome to the forum :D