#4 Ember Moon

Let's be honest here.
Whether you think Ember Moon could win this match or not, you have to admit it would be interesting to watch The Baddest woman on the planet take on the war goddess for The Raw Women's title. In fact, it would be a great test for both superstars and probably elevate both superstars in the process.
While some fans might get upset with this idea, especially since it would most likely result in a loss for Moon, one has to remember that Riott lost two matches to Rousey and still looked good in defeat. With that in mind and the kind of intensity that Moon could bring to the matchup, it would be a very fun match to see play out at a pay per view.
In the end, Moon needs to be better showcased on the Raw roster and a match with Ronda Rousey would definitely be a great first step in accomplishing that. It could also be one of the biggest moments of Moon's career and could also help show WWE that she can be trusted in high profile situations on the main roster.