I prefer to look for an anime series from 16 or more with a lot of romance and action on Netflix or Prime Video. Does anyone have one?
Devils Line
I would recommend Beatles to you on Amazon Prime. It's very well done, but like most romance anime, it's also a bit sad. There are also many action scenes in this anime.
I found Akatsuki no Yona very good and beautiful!
Maybe you will have a look! I would be happy to introduce more people to this anime.