5. Ronda Rousey
Say what you like about Ronda Rousey, but during her time at the top, she was a true force of nature. Sure, MMA has evolved since her era of dominance, but she remains the most successful female UFC champion of all time with 6 defences. Statistically, she deserves to be this high.
The former Olympic judoka used her armbar with great effect. Practically all of her wins came in the first round using the vicious technique. Until her shock defeat by Holly Holm, Rousey looked invincible and was the first true UFC superstar.
