First of all, all the Aqours are good. Secondly, Kurosawa Ruby is by far the most underrated member of the group, and the one that tends to get the most overt dislike or disparagement. This is super unfair because as she will tell you herself, she always does her Rubesty. She also happens to have one of the best character arcs in both seasons of Love Live Sunshine. I touched on this briefly before, though it was mostly in the service of discussing her and Hanamaru joining the group.
Spoilers, I guess.