Heh, pretty much. Really flexible when you listen to a SYL song right next to one of his solo project songs. And if you've heard the Ziltoid the Omniscient album, then you'll know that he voices everyone.
Also, Chris Alvestam counts. Most people knew him from Scar Symmetry and Solution .45 which are both melodeath, but he also does some cool trad death projects like Miseration or Torchbearer, where I think he did both vocals and guitar. Then he's got his solo project, which is progressive pop, where he plays everything, which includes a saxophone.