Noblesse, One Punch-Man Recommendations
Although Rai and Saitama are very different in their hairs, both are overpowered and always the last arrive to deal the finishing blow. Both have their assistant too (Frankenstein in Noblesse, Genos in Onepunch Man)
If you liked One Punch Man, then you might like Noblesse.
One Punch Man started as a webcomic before being reillustrated by Murata into a manga, and Noblesse is a Korean webtoon.
Both are comedy and action.
The main characters are overpowered, and both have a faithful disciple or servant. Both are also often the cause of the comic scenes. They can be really hilarious.
If you find yourself laughing at the unexpected, pleasantly interrupting comedy in One Punch Man, I bet you'll also love the same kind of comedy in Noblesse.
As for the action, both MCs fight various stereotypical villains. However, fights are taken more seriously
If you like Noblesse you might also like Opm cuz both manga have a lot of fight scenes with a very versatile cast of characters. Also the Mcs are both very overpowered and watching them kick ass can be very enjoyable.