Some would say Snape was who Harry hated the most, then they would quickly move to Umbridge.
Others would say Voldemort, but at this moment in the maze you would be reminded of the boggart.
Sadly, this was not that, as Harry, and now Cedric had just discovered. Well, Harry discovered, Cedric was still processing, mouth agape as Harry pulled him behind the pedestal where the Tri-Wizard Cup stood. Sadly, as Harry went to grab the cup (since he still was holding Cedric's wrist, they could both escape according to Bagman at least), it was not to happen, as Cedric, not having that information, and not being able to cast a patronus at the moment.
It is one thing to think a happy thought and cast a patronus in the DA room, but while one is a meter away, and bearing down, not so much.
But pushing it away, getting some space, more space, room to breathe, breathing would be nice…
"DEPULSO!", and the dementor was pushed away, but so was the cup Harry was about to grab.
Apparently dementors do not weigh a lot, at least compared to the mass of the cup that was rocketing towards it. It is interesting to note that dementors share the innate response to block with their hands, and block it did. Perhaps in a past life it was a seeker, because it also managed to catch it.
And "Poof", it was gone!
A couple breaths later the maze, or at least most of the maze, started shrinking down to the ground. After a few breaths they helped each other up, and looked around.
There were still parts of the maze, but no creatures. Then they heard creature noises, apparently the creatures were boxed in by the remaining maze.
They walked out, Cedric joking that Harry would have to get the prize from the dementor,
with Harry replying, "No, I want to see Fudge award the dementor".
As they got back to the start, they noted the confusion, Fudge blustered about "where is the cup, Harry lost the cup…",
Dumbledore spoke over him to Harry, "What happened?".
As they explained, Ron, Hermione, Neville, Susan, Madam Bones, and Cedric's father joined them in time to hear about the portkeyed dementor, all the adults turned to Fudge. Fudge began to bluster, and blame Bagman, and Crouch, and Umbridge, and (insert another page of any name other than Fudge). Luckily, we don't need to because the calm demeanor of Amos Diggery punched the minister and laid him out cold. By some coincidence, no one there was looking when it happened, although everyone else found Harry's comment about Nargles very amusing.
Amelia contacted the DMLE about a wayward dementor, as Amos informed her a dementor control team would be dispatched, and that they could track them now due to the Potter incident a few years ago, all of this was news to everyone else since it was kept secret in hopes of solving the mystery if it happened again. Of course Hermione had to question how an unknown dementor was in the maze… and then proceeded to answer her own question "Fudge!, it was part of his 'guard' he brought". Then "Poof", Harry disappeared. Four people whipped around to stare at Barty Crouch Jr., and 4 stunners hit him in as little time (Neville didn't know anything worse at the time).
Then Amelia received a patronus. The dementor recovery team included a few obliviators, and aurors due to the location. What they found was a mess, 2 dementors, and a few… bodies, one still alive.
What if you wanted to put a body and a soul back together, or more specifically more than one soul. Voldemort only needed one soul and body held together long enough to "age-up" to an adult wizard, and hold the magic. It seems dementors had a few uses. One of which entailed binding one and forcing it to reunite the two. Unfortunately the wizen are even less respectful of… well everything. It seems dementors do not like being forced to go against their nature.
You know what else we haven't seen, and likely has never been heard of before. What would happen if a dementor sucked the soul out of someone, but it's an incomplete soul. Apparently they would feel jipped out of a meal.
Not to worry, now we know! They have a taste… a hunger, and a need to finish the meal before they can move on. Now, as "unnatural" as they are claimed to be by the self appointed "top of the food chain", they are not. Nature, Magic, and Death, do have a sense of humor, and a bet concerning this very thing. That bet is against wizen, it just varies on what "life lesson" they might crawl away with.
Next to the dead Homunculus formerly housing Voldemort, appeared a black book, unfortunately it was in the hands of one Lucius Malfoy (Poor Lucy was looking over the diary wondering how much he would suffer under his Dark Lord for his error, and how he could avoid it).
Unfortunately for it… with only the signature of the soul, the dementor hungry for a meal that was not this soul, could only stare as Lucius had his mouth lovingly opened and his soul sucked out by the dementor that had free'd its compatriot, and killed Peter. The moral: "Be careful what you wish for".
Killed you say, but dementors only suck the souls out! In response, yes they do, but have you ever seen an enraged dementor, it might just scare you… to death. As it did Peter, and now Lucius. Next appeared Hufflepuff's cup, a mouth opened and a soul snack was devoured. Next a Tiara, though no Wrackspurt siphons on this one, then a gaudy pocket watch, then a ring.
Just to sync up the time order, this is when the dementor control team actually located the dementors in the Little Hangleton graveyard, and so did Harry.
Far too close to even point his wand, a maw opened as Harry made sure his mouth was closed, but it didn't matter a soul was being claimed, but not his.
There was no pain, and there was no screaming in his head, just a grandfatherly voice, telling him it was not his time and that he was safe, (no really, don't worry about dementors ever again). Then there were just two voices, calm and clear, praising their boy and telling him about Albus's plans, their Will at Gringotts, and that Amelia should take him there ASAP.
Then the first voice resumed "You will claim the ring before you as tribute from Voldemort, and the wand from Albus as tribute. They are rightfully yours, any challenges to this will be… dealt with."
When the dementor finished with the Harry Horcrux, a golden aura surrounded him, and as the dementors turned towards a snake that appeared, and Harry heard "dessert"!
(Ok, a bit of help: Death himself decided Harry was the best option as "Master of Death", and being MoD Harry was given the perk of control and communication over dementors… and Thestrals).
The Team had absolutely no issues with the dementors going after a snake, and Harry seemed to be in a golden bubble and untouchable.
After the final course the dementors went along oddly peacefully. Amelia and Dumbledore arrived and all was explained.
Harry informed Amelia that his parents Will named her next in line as guardian after Alice Longbottom and Sirius Black, Dumbledore balked, so Harry informed him that he knew Dumbledore was a witness to the Will, and also the caster of the Fidelius on the Potter Godric's Hollow property.
Then he turned to Amelia and asked her to arrest Dumbledore for attempted line theft. (Perhaps Harry's parents said more than I mentioned), I mean it was private family business…
(Oh, for those that didn't piece together the attempted line theft, I'll leave this other piece), The marriage contract signed by Albus and Molly was key evidence.
Amelia and Harry returned to the school in time for dinner, just as the governors arrived.
Minerva Mcgonagall was made headmistress, and Filius Flitwick became assistant headmaster.
But on to the end:
Fudge… There was great rejoicing when Fudge was dethroned, it seems the Daily Prophet headline "Fudge's out of control dementors kiss Lucius Malfoy, and attempted to kiss Harry Potter and the Diggery Heir while at Hogwarts", is hard to counter when you are running for your life. Nobody liked the idea of their heirs being that close to "uncontrolled" dementors.
Harry finished school, and got his Mastery in DADA, then became the DADA professor at Hogwarts.
But first thing after Hogwarts, he married his redhead… Susan Bones.
As for the others, you can write your own ending.