When listening to Joplin Alanis Morrissette came to mind as a singer following Janis. Just suggested itself and I turned it into thinking that later rocker chicks took her to heart -- I may be wrong, and enough people disagree that I might give it another listen.
Can't say I've heard any of yours other than the VU (I'm a fan, but it trails off rather badly. "What Goes On" is a candidate for my favorite song of theirs). That last one is rather unfortunately named.