Voldemort = an evil leader bringing people away from Yiddishkeit to a wicked secular philosophy like that of Sodom (rampant selfishness and immorality) or Communism.
Harry Potter = potentially the gadol hador or even Moshiach, with the bravery to lead all Jews and potentially all humanity back to true Yiddishkeit.
Hermione = someone who escapes obstacles in her background (being Muggle-born, being a woman) to become a great Torah scholar and a strong positive influence on the potential gadol hador Harry.
Ron = someone who escapes obstacles in his background (poverty, insecurity, dominant older siblings, average intelligence) to play an important role, as a trusted friend and confidant, in the rise of the potential gadol hador Harry.
Hagrid = pious and good-hearted but eccentric and relatively unlearned Jew, who because of his kindness and bravery is greatly valued by the potential gadol hador/moshiach Harry. (Much like the Besht greatly valued pious but unlearned Jews.)
The Ministry of Magic = the rabbanut, the charedi political parties, the rabbinic establishment at the time of the Besht — the would-be leaders who aren’t leading.