Btw, these two are ''God level'' based on this statement,
And the earlier one where ONE says that it's a good fight, and he doesn't know who wins. Both Boros and Prime Garou are God level.
In addition to what I mentioned above, SAITAMA didn't need to use a punch from the series "for real, serious punch" on BOROS, he didn't necessarily need a real punch, the punch he used on OROCHI but having direct contact with the body from BOROS, the wind caused by saitama's punch, swept away BOROS' energy wave, and killed him, saitama uses his punches "for real, serious" for god level creature, the energy wave that BOROS fired was planetary level , saitama used it to deal with the energy wave, and the attack wind (wave) ended up killing BOROS.
This confirms the GAROU's chance in its awakened form versus BOROS, the GAROU would not necessarily need to have the same AP as SAITAMA's punch to kill the BOROS.
And about the centipede and Gouketsu , you can't measure their power, they were probably the strongest executives because they were stopped by SAITAMA themselves, in OROCHI's speech it is evident that they were very strong, in my opinion as a reader, they just they were eliminated before by SAITAMA himself because if they received BUFF like the current executives they would be unstoppable and very strong for the heroes.