probably has to be someone like okiver. kalph is a good choice too.
i don't remember much about fungus, i mostly only remember that he exploited events and stuff and that i used to be in servers with him p often. i do have some respect for iban for how helpful he was in coding help when he came back. don't know if he actually did anything malicious during that time, p sure he was just banned again because he was a JerkHole to badspot (again), but i might be remembering wrongly
if this were "most disliked" instead i'd probably say someone like taboo, but he didn't actually do anything wrong aside from being a big meanie on the internet