Not a fan of rankings but i'll separate into success and taste
Success
1) ITZY
(G)I-DLE
2) Aespa
3) Loona
4) StayC/Everglow (StayC in SK, Everglow internationally)
5) Weeekly/Secret Number/Woo!Ah (secret number has the upper hand internationally but weeekly and less so woo!ah! do better in sk)
Taste
Lol I can't truly rank by groups so I'll do with the songs I know and/or prefer but the more I look at it the less it's a ranking lol
1) Itzy's Wannabe, Surf, Cherry and Be in Love
2) Weeekly's Tag Me, Hello, My Earth
3) Everglow for a La Di Da, Moon and some other bsides (it's been a while)
4) Woo!Ah! their 5 songs are actually pretty good, I like I Don't Miss You, Payday and Bad Girl
5) I-dle's Uh-Oh, Hann, Latata
5) Loona's Star/Voice, Why Not and Butterfly
6) StayC's So Bad
7) Iz*one's Fiesta, Panorama
Secret Number's Who Dis
9) Aespa: sorry to them, but having one song + one cover and me not liking it. I hope SM delivers with their next releases because I know the members can.
In terms of potential, I-dle's was growing but the last news make everything pretty uncertain. Itzy maintains a high position but can't reach the Dalla peak so I'm curious to see what will happen, hopefully they won't fall and continue to grow. Iz*one certainly has a lot of impressive achievements but they are this close to the end of contract.
Aespa for now is the only one to have potential from the rest of those groups, well to chart somewhere, followed by StayC. I really hope the other girl groups will grow well, I really enjoy their songs and while not everybody can have a Brave Girls moment, it is always nice to see other ggs rise!
Also, anticipate Purple Kiss when they'll debute!