If i understand the theory behind power scaling correct he might be able to do damage to others in their second evolution perhaps, but certainly not all of them, let alone the people on their third evolution higher....
We see MC resisting Jakes powers, we see Ella resisting the iron maiden power of the level 3 HERO character, and a lot more events like that... (same reason why MC hasn't seen any memories from Ella or other superhumans, so far he only gets to see those when fighting or eating them, if the power difference is too big the skills can't overcome it)
We can safely assume his powers come from a very strong monster so he has a lot potential. But without evolving it's just not enough to be problematic for most characters in a higher evolution.