Also, Boros is still the strongest enemy Saitama has "fought".
Monster Garou will be 2nd to that, but Saitama KNOWS that dude is human so he doesn't even punch him. That's why he does the headbutt and shit, those aren't one shot kills for him. Honorable :')
and then idk Vaccine Man, Gouketsu, G-Shoop, Carnage Kabuto or Orochi.
Doesn't really matter after Boros tbh, he's blatantly stronger than anyone else, maybe make a case for Tatsumaki with feats but meh, feels doubtful.
Orochi had to get real serious real quick when trying to catch a beat down half conscious Garou at first soooo idk how strong that big fella really was.
All I know is
1. Boros
2. Boros (Armored)
3. Monster Garou (Perfect Cell Final Form)
4. Who gives a fuck / Rover
5. etc;
6. etc;
you dont get typical shonen enemies where everyone that follows the next is more powerful than the last. OPM is more realistic, he fought the planet buster universal world champion and conqueror of universes in Boros and blew em up. Took 2 punches also and a trip back from the moon. If i get some road rage in traffic and end up fighting someone, and then it happens again every week later for a year straight im not going to keep climbing up some ladder of fighting skill and might until my traffic fighting saga places me against Anderson Silva on I-95 behind the jersey wall. It's ridiculous lol.
tldr; show is funny stop making it serious & Lord Boros will go down as the 2nd most powerful character by the end of OPM.
the end. sorry for talking so much :/