There’s a wonderful website called “Guerrilla Skepticism on Wikipedia” and the group’s mission is the fix the Wikipedia pages of people and issues concerning science and pseudoscience.
For example, they make sure articles about, say, astrology only include claims with credible citations. (Not an easy task.) They also improve the pages of notable skeptics so that people looking for information about them can find it.
It’s not about bias or promoting an agenda. It’s about making sure proper information is out there for people looking for it. You can take a look at their most recent accomplishments here.
They’re looking for a few more editors who might be able to help out, so if you’re interested, please send them an email!