6. Chyna
If you're talking about the most successful women in WWE history then Chyna is right near the top. She started in WWE in 1997 at the age of 27 and her run lasted about five years before she moved on from the company, or maybe they moved on from her. During her run in WWE she was a 3 time Intercontinental Champion (no other woman has held the IC Title) and also a 1 time Women's Champion although she never actually lost the title because she left WWE. What Chyna brought to the table is a unique look that nobody else could bring. There were actually women that tried to be like her such as Nicole Bass and Asya in WCW (what a crafty name huh?), but neither one had the talent of Chyna. Her departure is very confusing because the story goes that her ex-boyfriend Triple H had started dating Stephanie McMahon around this time and that's a big reason why Chyna ended up leaving WWE. Whether true or not we don't know, but it seems like it's very possible. It's highly unlikely that she would return to WWE due to her erratic behavior after leaving WWE, which includes drug & alcohol as well as working in the porn industry.