#2
Try pentatonic and blues scales, they usually work good for that kind of stuff. Also try mixing Major and Minor Pentatonic scales. Mixing the two scales probably won't work very well over that progression, but it sounds good under the right circumstances. You probably won't want a lot of distortion when playing this style of music!

Some scales you could use are G Major Pentatonic....E Minor Pentatonic, and E Blues scales, with that progression.