Also in Europe, you have Liana Jouja (6-2), who might really be a Flyweight, but has another bantamweight fight scheduled. And Zaira Dyshekova (4-2), who has a win over Yana Kunitskaya, though she likely got it based on toughness alone. Katarzyna Sadura (3-2) is a teammate of Karolina Kowalkiewicz, and she is kind of hot.
In the United States, outside of Invicta, Leah Letson (4-0) has looked good. Shanna Young (4-0) is also around, she has a win over Pam Sorensen, I believe she will be making a return in 2018, after a knee injury. On the US amateur circuit, Lisa Spangler (8-1) and Gillian Noll (7-3) are young and have been winning, though I haven't seen them fight.
In Brazil, Karoline Rosa (5-1), Mayana Kellen (6-0), Mayra Silva (4-0) and Norma. Dumont (3-0) would seem to be ok prospects, though I haven't seen much of their fights. Gisele Moreira (7-2) of Brazil has some good wins, although she is 36. Taila Santos (14-0) would seem to be a good prospect, but she hasn't fought in 2017, not sure why. Sarah Frota (6-0) is pretty good, but she is like Christine Ferea's and Ediane Gomes' love child, so she doesn't have the "look". Duda Cowboyzinha (2-0) might be someone to watch. Alexandra de Cassia (3-3) is only 20, and she has losses to tough competition, plenty of time to get better.
As for Invicta, they have Sarah Kaufman, Yana Kunitskaya, Marciea Allen, Katharina Lehner, and Raquel Pa'aluhi. These 5 women have an idea of their strengths, they could probably compete in the mid to low end of 135 the UFC. Beyond those women, Pannie Kianzad, Julia Avila, Alexa Conners, Kelly Faszholz, Yaya Rincon, Sarah Kleczka are all decent. Some might need a year or two, but they are on their way up. I particularly like Rincon. I am for safe weight cutting, but if Felicia Spencer and Pam Sorensen found a way to get 135 safely, I'd include them on the list.
In Australia and South Korea respectively, Janay Harding (3-2) and Jung Yoon Choi (2-0) are alright athletes, just extremely raw talents.
Obviously not all these women will pan out to be good, but they've at least shown the ability to win fights, so it's certainly a start. This is women's Bantamweight after all.