Fanny was good but didn't get the recognition they deserved, just because they're female. Check out this video of them rockin' out, great guitar solo by June at 5:50. Low quality video but it shows they could kick ass. From what I see on YouTube, the Millington sisters are still rockin' but there doesn't seem to be any good videos, just short clips.
https://en.wikipedia.org/wiki/Fanny_(band)
https://en.wikipedia.org/wiki/Fanny_(band)