hiei the pk isn't very good anymore, like I had about twenty fights with him in pvp (before the new bh came out) and he was just terrible. He had like the second most whip pk's though in old wilderness so I still have respect for him .
Kids ranqe was a really good pure imo, he was one of the first maxed ones and I loved his vids.
Maikel pro was just beast, and risked items that people used to never risk.