Here's the List of Korean Novel's that i read, true i didnt read them all but this is my top ten that i already read and also some of my recommendations if you want to read Korean novels.
I recommend to read Top 10 first before Top 1 because you will see the difference between the top 10 till my top 1 why it is rated that high and why it is good to read some Korean Novels.
Why korean novel?  Because i read CN, KR and JP novels for 4 years and i somewhat know that this country has some different taste as to what their MC and Story should have been. as To... more>> what makes Korean novel different to other Two, They have better Story and made use of its Title to be its main plot, unlike JP's title that will turn into Harem genre. i didnt say KR novel is better than the two but it has its own charm that you need to read it so that you will know what made the difference.

PS. this is only my opinion and i know you might not agree to my Top 10' also i didnt read much KR novel because CN novel's is too long to read.

1. The Legendary Moonlight Sculptor

2. Novel's Extra

3. Overgeared

4. Ark

5. Everyone Else is a Returnee

6. I alone Level Up

7. I am the Monarch

8. tr*sh of the Count’s Family

9. A monster who levels up

10. Seoul Station's Necromancer <<less