I read the latest chapters of strongest system today and now lin fan seems too have acquired an OP eternal arm, maybe after this he will be undefeatable and then that novel can be considered to be worthy in my list, although even Lin fan lost few times and even lost his whole sect but i will forgive the author if he won't lose in future :P
UPDATED LIST
1. One Punch Man
2. Hareluya II Boy
3. Noblesse (However for this, I doubt that Nobesse will not be defeated in future, but till now he has never lost in near 500 chapters)
4. The Strongest System (although MC lost and also his sect was destroyed but recently he acquired a super OP demon arm, so i have hopes for this novel to be of my standards)
5. Ultimate Scheming System (here MC lost his first girlfriend, but he has way to revive her..... also he never loses too as he can escape from tough ones with escape emblems)
6. Shadow Hack (It's new and MC is doing quite well till now, but i am not sure if he remains undefeated and OP in future)
7. God of Slaughter - He has no loved ones to lose lolz, and also somewhat undefeatable.....
8. Mystical Journey - A new novel, but MC is doing good till now and may also emerge to be undefeatable...
9. Monster Paradise - This hero has never lost too and is super op himself and also his monsters are even stronger than him ....
To be read or checked for their worthiness of being in my list
1. Absolute Choice
2. Emperors Domination
3. Library of Heaven's Path
4. King of Gods
5. War Sovereign Soaring the Heavens
Novels that have OP heroes if not totally ultimate like OPM
- True Martial World - It's usual xianxia with OP hero but he has been defeated many times too and even suffered humiliation and torture under few villains like Shentu Nantian, which i really hated most....
- Coiling Dragon
- Stellar Transformations
Awaiting for this list to be grown through your help :)
Note list can be edited for some of listed novels which i hadn't read, so can't say if they are upto my expectations :)