Cherry Bullet.. I guess compared to other rookie groups they are doing pretty well for themselves, but I find that each member has their own charm, they dance and sing well and have good synergy.
I remember a lot of people talking bad on them when they said in an interview that they wanted to become nations girl group, and it only made me love them more. Their title songs are catchy and album quality is also great, if you're into collecting physicals. We are also getting our fandom name soon (fan submitted).
Other recommendations I have are:
GWSN: They caught my attention from the get-go. Puzzle Moon is such an amazing debut song imo, and the MV quality/concept is amazing! I didn't like Pinky Star as much but I am really excited for their comeback, Also their fandom name is Groo which is weirdly cute haha. Anne is my bias in this group because she has this really pretty and mysterious gaze.
Dreamnote: I don't know much about them myself but they caught my attention so I've been learning about them! Also their fandom colors are pretty unique for a GG.