It's so awesome to see amazing fan art like this for webtoons! It seems like they're getting a lot more popular recently. Lately I've been really into A Compendium of Ghosts. It's up on Lezhin and classified as a drama, but there are definitely some similar fantasy elements to Noblesse in the story. I originally checked it out because it has a very unique art style, but I started to get really invested in the story and the characters after only the second chapter. It uses a lot of paranormal/Korean folklore aspects in the plot, so it keeps the story intense. I definitely recommend looking into it if you're looking for another webtoon to read.