I say Harry (cool I inspired a poll!!!)
'cause his adventures always start because of bad things right from h baby days (de Dursleys). Sure Harry's outcomes are usually good but did you notice that there tends to be someone he knows dying when the outcome manages to get very bad. like Quirelle (even if he was a badguy), Cedric, his parents, and there's the rumor of another death in the new book!!! People die when they know Harry!!!
However it doesn't seem to make the boks any less fun
(long post... >_<)