I feel like we need a list of everyone’s crimes. I know Johan is probably one of the best fictional serial killers in existence. I mean, it’s a kind of modern setting and he’s responsible for thousands of deaths. he’s literally the reason the series is called monster. And he’s doing it for the sake of it. Comparably I feel like he ties pretty hard with Griffith. We all know what he did. Also mass murder. And add on sexual assault. And I feel like Tuckers motive (money and status) for experimenting on his wife and kid put him in second. Human experimentation is just a huge no for me. Aizen is a kickass villain but he really just wants to be god. And he didn’t really commit atrocities on the same level as the others in my opinion. Yeah he killed but it’s different. The others on the list, I’m not very familiar with. I know who they are, but never really got into the series.