#3 Natalya

Natalya is probably the most underrated Superstar in the female division. She is a 10 year veteran in the WWE, which makes her the most experienced Superstar in the ladder match.
Natalya is a talented worker within the ring. It makes sense for her to win the match storyline-wise, considering her best friend Ronda Rousey is involved in the RAW Women's Championship match against Nia Jax.
Natalya could win the briefcase early on in the night and cash it-in during or after the Women's Championship match, robbing her best friend of her opportunity. This will immediately put her into a program with Ronda Rousey, which could turn out to be an entertaining feud.
Natalya could really use a major win at this point in her career to show her dominance over the female roster.