Highest-quality erotic romance you've read?

• Regardless of niche/kink/whatever

• POV irrelevant

• define "high quality" in whatever way makes sense to you, it's broad on purpose

I'm trying to read as much good material from this genre as I can and I have a wishlist set up for this purpose but I'm definitely missing a lot. Going by popularity isn't a very good bet since some books can be very popular but also cringeworthy, as we all know from the Fifty Shades series.