5. Garou

Garou is a villain who beats up heroes badly enough to send them to hospital with serious injuries. He used to be a student of Bang's Dojo where he learnt the Water Stream Rock Smashing Fist that he uses for his offences.

Garou brutally beats up heroes and villains alike, anyone who gets in his way really. We have yet to see what Garou is truly capable of since in the latest episode of One Punch Man he attacked Saitama because he mistook him for someone following him and ended up being knocked out.