
Chinese :
Mo Dao Zushi (zombie wuxia world, action packed. Also available in manhua)
Heaven's blessing officials (checkout the anime, if you interested, the novels are already translated. Also available in manhua)
Legendary Master's wife (harry potter like novel, but in wuxia world. MC is literally in magic ancient china academy, catching beasts, making potions, learning spells etc)
Korean :
Fifth Morning (Multiverse where everytime MC died, he was reincarnated into another universe, but his 4th life seme follow him to his 5th world)
How to survive as a subvillain (isekai where MC actually left his toxic ML for 2nd ML)
Things that deserves to die (action packed)

OH AND:
Married thrice to a Salted Fish - transmigration
Card Room - UF
The Days I Clear Escape Games Pretending to be an NPC - UF
The Earth is Online - UF
(disclaimer I DF these novels cause a) attention span b) translations/chapter uploads were not up to speed but I feel like they should be done by now????) I'm still throwing these out there in case some of yall are better than me and seeing that we're on the topic of UF
Also if you don't care about mtl:
Genius Mechanic
If you want something less sunshine and rainbows then try meatbun's works (yuwu, 2ha, case files), that is in order of how fcked up they are from least to most. 2ha is her most popular one though.

Both mc and Ml is hella smart:
I'm Not Shouldering This Blame (apocalypse)
The reborn otaku's code of practice for the apocalypse
First Class Lawyer (scifi)
Other good reads:
Little Mushroom (scifi)
The Number 1 Pretty Boy at Immortal Path (murim)
Reborn with an old enemy on the day of our marriage (modern)
Picked up by a protagonist of a tormented
Can anyone suggest a good completed novel? Preferably Korean or chinese novels thank you