AN: So sorry about the chapter being in HTML, I'm usually on point when it comes to sorting that error out. But, it's fixed now and as a bonus, I added Ron's fate in the epilogue after he was forgotten... Enjoy!
With He-Who-Must-Be-Named-Differently-Every-Time-For-Comedic-Effect defeated once and for all, Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell lived a long and happy life with no hardships whatsoever. Naturally, the massive power vacuum created when Drugsnort died was never filled, despite multiple dark wizards and witches with both the power and motivation to do so still existing.
Heck, even Umbitch didn't even put up a fuss during her lifelong stint in Azkaban, where she finally succumbed to a stroke after one of those filth half-breed dementors finally tried to suck what little soul she had. Fudge followed soon after, dying on the shore of Azkaban during a failed escape attempt where he used his stupid looking bowler hat to dig his way out. Rather ironically, he suffocated to death when his tunnel collapsed, burying his head in the sand.
Doctrinaire ended up in an asylum after a muggle police officer caught him forcefully kidnapping a random raven-haired muggle boy who received a scrape on his forehead after a game of football. For the next ten years, Fishingpier would wander though the halls of the insane asylum, raving about sacrificing children, lemon drops, and the greater good.
Until one day, the old coot tried to wandlessly apparate to Hogwarts. The combination of not having a wand, not having practiced magic in a decade, and being barred from entering the school resulted in the senile old fool somehow splinching himself. Naturally, he ended up in the Department of Mysteries where he tumbled through the veil after trying to walk on a non-existent leg.
Ron did actually end up making it to the great hall in the end, despite having his kneecaps blasted off by Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell's harem. Fortunately, he was curbstomped by Winky after trying to consume the entire school's supply of roast potatoes, bacon, and sausages.
Only the Gryffindor table was really affected by this catastrophe, but thanks to some inter-houseTM cooperationTM, everyone shared their food supplies. None of this had anything to do with the veiled threats from Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell about what happens to those who don't share
But aside from that, it was all sunshine and rainbows for the good guys. Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell's harem placed themselves in all the most key positions in wizarding Britain, effectively giving Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell total control of the country where he completely reformed the Ministry of Magic and eliminated pureblood culture (except for the parts which benefitted him of course).
Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell also had multiple children with each of his many wives, until at one point eighty percent of the Hogwarts population were Potters. Naturally, the other twenty percent were all named Harry or Harriet as the entire wizarding world was in awe of his prowess. The name Hadrian was copyrighted by Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell because why should he have to share a name with any of the peasants below him?
Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell eventually officially took up his position as the owner of Hogwarts, where he completely reformed the entire school. Over the next few years, he introduced various Americanisms which he should have had absolutely no knowledge of, turning Hogwarts into a generic AmericanTM HighTM SchoolTM with a bit of magic as well.
But after all was said and done, Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell made good on his life goal of settling down with his harem. Thanks to abuse of long forgotten marriage contracts, life debts, and undiscovered soul bonds, Lord Hadrian James Potter Black Gaunt Gryffindor Slytherin Hufflepuff Ravenclaw Peverell's harem grew to an outstanding fifty-three women (and Draco Malfoy after they both declared their undying love to each other). Then they all lived happily ever after, spending their days manipulating the Wizengamot, modernising the wizarding world, and having massive orgies.
The end.