Kyochon is actually a bit overrated, it is not bad but I find lack of the authentic Korean taste haha. K-fry is alright, 4 fingers is my go-to place.
I really like Chicken House from Mont Kiara, very authentic taste and portion not bad, but recently tried delivery and the chicken came with more batter than meat :/ but I suggest you can try it still.
Goobne is not bad too!
Korean fried chicken recommendations