As you seem to like a sociopath MC, I suggest Renegade Immortal, Warlock of the Magus World, Emperor Domination, Kaifuku Jutsushi no Yarinaoshi, Summoned Slaughterer, and Ouroboros Record.
Warlock of the Magus World Experimental Log of the Crazy Lich ( later chaps and is more funny undertones ) Supervillain ( RRL ) The Void Wolf ( RRL ) Supreme Magus ( QI )
The last time I've checked, I think the WN stuck at around 80+ chapter. The LN is already discontinued. Most likely, you won't get further update.
On webnovel there is: Trafford's Trading Company (Excellent) Strange Life of a Cat (A casual but good read) The Legendary Mechanic (One of the better books and he has a similar personality to Klein in that he also likes to think everything out and occasionally does something spontaneous) I Am the God of Games (If you liked The Fool chapters) Throne of Magical Arcana (by the same author as Lord of the Mysteries and also a quality work) Release that Witch (great story and smart mc) My House of Horrors (Haven't read to much of it but from what I have read and heard, as Trafford's focus is on psychology and people this is pretty much all action)
Mystical Journey My House of Horrors The First Order Kingdom's Bloodline Nightmare's call Darkmoon era Empress' livestream Empire of the ring The Record of Unusual Creatures The Legendary Mechanic World's apocalypse online
Rebirth of the demonic sword (webnovel) Trafford's trading club(webnovel) If you read fanfic then Too young to die Umbrus Shade, The Incredibly Annoyed Ravenclaw [Harry Potter/SI] The many deaths of Harry potter Long live the hokage (is decent)