This may be just me, but I usualy do best against G. Rugal with Zangief. Zangief is one of my favorite characters to use in SFA3 and because of this, his watered down version in CvS2 is much easier to use for me. G. Rugal just seams to eat up whatever I throw at hime, and I often end rounds with Zangief's Final Atomic Buster to boot.