http://www.mangago.zone/read-manga/nurarihyon_no_mago/
Saw someone watching the anime for this. It seems interesting. Gonna start reading it myself. Hope yo you enjoy
Off the top of my head, these ones might suit your interest
Peerless Dad
A Returner's Magic Should Be Special
MASHLE
This one's mc isn't OP by himself and the plot isn't really about rising to the top, but it's my favorite isekai with an insane cheat power
http://www.mangago.zone/read-manga/tondemo_skill_de_isekai_hourou_meshi/
And here's the tag
http://www.mangago.zone/tag/op%20mc/?page=1
Here are some of my faves :)
http://www.mangago.zone/home/mangalist/637170/
Preferably no ecchi and harem but its okay if it doesn't affect the plot. I have already read something like:
- solo leveling
- skeleton soldier
- Tensei Shitara Slime Datta Ken
- kenja no mago
- the scholars reincarnation
- the ghostly doctor
- volcanic age
- magic emperor
- peerles alchemist
- beginning after the end
- i am the sorcerer king
- ranker who lives a second time
Please help im super bored ╥﹏╥
It could be anime or manga or both