There is too much good RG girls but no one as good as RRose. Hydrangea is a good choice but she cost a lot as a 3* girl. She works well with Flame Lily. Regular Camelia got a buff recently because she didn't needed it. Now she is even better than Saffron with a lot of ATK buff and the rare combo of evade+super counter. Fire Thorn is a very good Counter+Crit. It's just like Kayana but better.

If you want a girl close to RRose power, you should look at Balsam. But she is a 6*.

And speaking of Alstroemeria, she is good now and even better than you can think since it's easy to get her max equip slot. A solid choice for Crit+React.