Sorry, I just want to say something real quick.
If you're still looking around for another lead, then I'll just throw Aerodactyl in the air. It dies quick, but it almost never fails in getting it's Stealth Rock up. You could also try using a Life Orb Heatran lead. It works amazingly well, and ScarfGon could take his old position as a revenge killer
Also, if you want an Electric resistance, then I guess you could try ScarfRotom-H over Gengar. Like Gengar, he can sweep and still have Trick to screw over Blissey. It's also a lot more offensive than that other Rotom set, which seems to fit your tastes better.
OK, I'm done. Good luck with your team and all!