#4 Marloes Coenen
A former Strikeforce Bantamweight champion, Marloes Coenen started fighting professionally in 2000 and was a mainstay in Strikeforce during the later stages of her career. She fought some big names like Miesha Tate, Cris Cyborg, Sarah Kaufman and Roxanne Modafferi during her career which ended with a professional record of 23-8.
Coenen was so iconic that she was chosen to headline the first fight card of Invicta Fighting Championship which was held in 2012. Although she secured a win in the fight, her second fight in Invicta ended in a defeat as she was outclassed by Cris Cyborg.
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Coenen also had a run in Bellator MMA where she fought four times. It was some contractual disputes between her team and the UFC that kept her away from the Octagon. This fact, however, takes nothing away from the legendary career that Coenen had.