#4 Becky Lynch
It pretty much seems so far that all eyes are on the RAW roster to have the winner of the women's Royal Rumble, but you shouldn't count out the ladies of Smackdown just yet, particularly the Irish Lass Kicker. Becky Lynch is the first WWE Smackdown's Women's Champion in history. She lost the title to Alexa Bliss after a 3-month reign at TLC 2016 and hasn't been close to retaining the strap since.
Becky is more than capable of being the face of the Smackdown women's division and has proved she can go toe to toe in some great matches with the current Smackdown Women's Champion Charlotte Flair. It doesn't always have to be the traditional face vs heel showdown at the grandest stage of them all. A face vs face Charlotte vs Becky match would be every bit as compelling.