Mumen Rider is such a badass though.

As is Genos. I shed tears of manliness for Genos' sacrifice to save the little girl. As I also did for Mumen Rider's attempt at saving everyone.

As far as we cam tell, there are only 4-6 heroes who actually give shit. Saitama, Genos, Mumen Rider, and a whoever else is relevant for the plot.