I have Stormies in a Traditional, I also have Mules and Riff Raffs, and I don't think they're what you're after.
I don't want more output at the moment, but if I did, I've been listening to tom's Black Dog clips (admittedly in an SG), and they seem to be giving the same vibes I like from Stormies but with more oink...
The other option I'd been wondering about definitely was Abraxas - but I had the same worries as you, if they're a "hotter Mule"... nothing wrong with that, except I like the taste of the Stormies, and Mules have their own thing going...
BUT! Tim's last post ^ takes that worry away for me... If I was seeking to up the power on the Stormies I love, I'd probably try Abraxas now.