Hmm, but most of Brienne wholesome scenes are locked behind sexual content, and especially behind pregnancy.
Ryn, in contrast, you can take on dates, casually hug and give teddy bears, Brienne is mostly lovely dovey if you have baby with her or fuck her. Which isn't bad, mind you, but if you ever tried playing a pussy only champ, her wholesome moments are to far between.
Arona is also like that.
Which considering your initial statement of "less sex, more wholesome" feels little out of place. I do agree those are wholesome all the same. But you get why Ryn was really only one that came to mind.