Caro is going to retire soon so get her while you can. Tiffany, Vanessa, Tatiana and Conny all seem to have great reviews.
Generally, it is a great sign is when a girl worked at a spa and went independent. She could only do this if she had the demand. Tiffany did that. So did Thalia (more recently)
This list is a little older but is a good start too:
https://catadorcolombia.com/threads/bbbj-tdl-lista-de-chicas-que-hacen-oral-natural.10508/
Even if you don't care about BBBJ, the 4 & 5 star girls are a great start.
NEVER pay in advance. Locals don't do this and foreigners definitely should not either. 99% of advance pays are a scam.
Of the girls below, remember that many of them switch around so some of these girls may be gone by now. NOTE: I haven't tried any of them and even if I had, YMMV but most of them have been mentioned here multiple times and mostly by people with some credibility:
Zandaly: Dulce, Yisell, Andrea, Mia, Charlote, Daniela
Ellas: Salome, Lucia, Luisa, Carolina, Alejandra, Isabel
REMEMBER: Contact them early. Both before your trip, and around 9-10am on the day of. In demand girls can be hard to reach. Especially because they know that your foreign number is more likely to be a one-time thing.