Korean r&b was my second top genre in my wrap this year, I could defiantly list you some. You might like a couple of these artists. I have so much more to suggest if you need it~
B.I is a really good artist I would highly suggest, you don't have to know iKON or his history with iKON to enjoy his solo stuff. He has a lot of variety.
Xydo is amazing.
Yerin Baek is def a must for new listeners, amazing voice.
I believe KozyPop can be considered as R&B, he works with a lot of artists from the genre.
I also enjoy Loco but I understand not everyone enjoys his singing style.
Coogie could be either r&b or hip hop/ a mixture of the two, but I love his songs.