Well in the oversight list there's Theresa knott so there's one person with oversight that was born female. There might be someone else, but I don't recognize anyone. Taxman, by the way, is not "Taxwoman" who a female friend of Poetlister.
Well I mentioned Minspillage on ArbCom, running for the board (did she make it? I'm not sure where to look) and I found this http://en.wikipedia.org/w/index.php?title=...&oldid=59418079
== Oversight ==
I've temporarily removed your oversight privilege, as it appears you've been removing some edits that aren't legal issues. Use of this tool needs to kept to the absolute minimum due to the way it removes evidence completely from public history. --[[User:Brion VIBBER|Brion]] 22:31, 20 June 2006 (UTC)
So it looks like Mindspillage did something that made her lose Oversight and she doesn't have it currently. So maybe that's why she hasn't got checkuser.
Although I could be missing somebody, out of checkuser and Oversight, one female has Oversight and the rest were born male. That's pretty sexist.