Danni Dawn, Kylie Cole, Hayden Ryan, Stella XO...these are the "new NN models". Of the ones listed, only Danni shows some nudity. They're all fairly new but it seems like Danni/Kylie will be open to at least partial nudity in the near future (Danni already allows slips). Sherri Chanel is also up and coming and does great tease stuff. Alisa Kiss/Brooke Marks are two fun babes who are on the way out, but they each have large histories of content.
Alisa doesn't have any zipsets or anything but she regularly gives flashes in her videos. Brooke gives lots of nipple/tit flashes and even some pussy stuff in her webcams as well as her zipsets. I could never get into Nikki Sims or Meet Madden for whatever reason, but they're also still there...on the way out imo. Madden is still active as ever, but her content just dulls me, again, for whatever reason.
These are the girls I regularly follow though. Also, Tiffany from Honey Cream is very hot and is kind of active - about 10 vids - sexy as hell with some slippage/sheer
Tons of those girls on teenstarlet and TBF (who are all like 16-17) will be doing NN stuff or straight porn in the next few years. The NN niche will definitely not die out and is probably actually growing.