Ehhhhh, I'd say that this list is filled with shounen/seinen that has not-too-light themes. Not as in being bloody gory, but more of questionable morals of the characters (so like Griffith). Anti-hero, right means to a wrong end. And if you're into this typa pain, you might be interested in dysfunctional stories with Bad/Ambiguous Ending too https://bato.to/batolist/mkvoae