The Engineer while she was a part of the Authority (NOT DC REBOOT STORMWATCH) was a genius. She created nanite technology that replaced her bloodstream and could also be used to duplicate herself and create weapons. She was in love with her tech, and so brilliant. I weep at how her character was slaughtered and origins changed to alien abduction instead of reviling in all of her genius.
With the DC Reboot though, Stormwatch has Jennifer Quantum and she's the new century baby. She is a reality warping quantum physicist child.
There both from the same team at different times though. I was just having this convo with a friend when discussing the Secret Avengers team rooster and how it could be more appealing and not look so much like a patriarchal dictatorship of rich dudes making decisions. We were trying to come up with genius women who had the capability to be offensive characters on the battelfield as well in Marvel. Pretty slim pickings.