The Grangers. Hermione's parents are Muggles, but if they were made aware of the wizarding world early on, they could adopt Harry. He'd have a stable, loving home environment and would also be exposed to Muggle knowledge, which could be really useful in his magical studies. For example, scientific methods could be applied to understanding some aspects of magic better.
Well, in a 'Harry Potter adopted by Delacours' fanfic, it could be really interesting. Harry would be part of a family that has a different set of values and customs. The Delacours might train him in unique ways of magic that are more in line with Beauxbatons. He could get to know the Veela heritage better, and perhaps it would give him some advantages in his magical abilities. Also, there could be new storylines around his interactions with the Delacour family members and how they deal with the fame and danger associated with Harry.
One possible plot could be that Marge, despite her initial rough exterior, discovers a soft spot for Harry. She might start to teach him some of her own values, which could be a mix of traditional and rather strict ones. Harry would have to adjust to living in a new environment with Marge's dogs and her no - nonsense attitude.
In this fanfic, perhaps Harry Potter is orphaned in a different way than in the original story. Goku stumbles upon him and, not really understanding the concept of magic at first but sensing Harry's good heart, takes him in. Harry would be introduced to Goku's friends like Bulma and Krillin. Bulma might be fascinated by Harry's magic and try to find a way to combine it with her technology. As for Harry, he'd have to adapt to a very different world. Instead of Hogwarts, he might train at Kami's Lookout. And his relationship with Goku would be one of a son - father figure, with Goku teaching him important values like never giving up and always protecting the weak, which would also tie in with Harry's own nature of fighting against evil in the wizarding world.
Well, it would be really interesting. Harry would probably be in awe of the high - tech gadgets the Avengers have. Iron Man might take him under his wing and upgrade his glasses to something more like his own high - tech eyewear. And Harry's experience with fighting dark magic could be useful to the Avengers when dealing with otherworldly threats. Maybe he'd even teach them some basic spells for self - defense.
Obviously, Harry Potter is one of the main characters. He is the one being adopted into the Greengrass family. Then, the Greengrass family members are important. There are likely to be the parents of the Greengrass family, and the Greengrass sisters. We might see Astoria Greengrass and her sister (if she has one in the fanfic). These characters will play significant roles in Harry's new life and the development of the story.
You can find 'Harry Potter adopted fanfic' on some popular fanfiction websites like FanFiction.net. It has a large collection of fan - created stories, and you can simply search for 'Harry Potter adopted' in the search bar. Another good place is Archive of Our Own (AO3). It's known for its wide range of fanfiction, and you're likely to come across many great 'Harry Potter adopted' stories there as well.
One popular 'Harry Potter adopted fanfic' is 'The Adopted Heir of Slytherin'. It gives a new take on Harry's journey with an adopted family in the wizarding world. Another is 'Adopted by the Weasleys', which shows a heartwarming story of Harry growing up as part of the Weasley family. There's also 'Adopted by the Malfoys', which flips the script and has Harry in a rather unexpected family situation.
Obviously, Harry Potter is the main character. Then there would be the wolves who adopt him. There might be an alpha wolf that acts as a sort of leader and protector for Harry. And perhaps there could be other magical creatures in the forest that interact with Harry and the wolves, like centaurs or unicorns.
It could be that the wolves are actually magical wolves with special powers. They sense Harry's unique magic and choose to protect him from the threats he faces in the wizarding world. Harry, while being adopted by them, might discover new forms of magic that are related to nature and the wild, which are different from what he learns at Hogwarts.