In the 'dumbledore is not harry's magical guardian fanfic', who could be Harry's magical guardian instead?

One reason could be that Dumbledore had too many other responsibilities in the wizarding world. He was the headmaster of Hogwarts and was constantly involved in dealing with the threat of Voldemort on a larger scale. He might not have been able to give Harry the individual attention and care that a true guardian should provide.

In some fanfics, Sirius Black could be an alternative guardian for Harry. Since Sirius was Harry's godfather, he had a strong claim to guardianship.

Hermione could be a great magical guardian in fanfiction. She's smart and resourceful. With her vast knowledge of magic, she could protect Harry in many ways, like using her spell - casting skills to fend off dark wizards.

One possible reason could be that Dumbledore wants Harry to have a more normal upbringing away from the spotlight of Hogwarts and his own influence. So he deliberately steps back from the role of guardian.

Dumbledore, as Harry's guardian in the fanfiction, would probably use his influence in the wizarding world. He could make sure that Harry is taught by the best teachers at Hogwarts. He'd also be there to offer advice and guidance, especially when Harry faces challenges like dealing with Voldemort or other dark forces. For example, he might teach Harry some advanced defensive magic privately to better protect himself.

They probably have a very close relationship. Dumbledore would be like a father figure to Harry, guiding him through the wizarding world.

It could be his mother, Lily. Her love was already a powerful protection for Harry, so in the fanfiction, it could be her spirit acting as a guardian angel, using her love to shield him from harm in a more direct and continuous way.

A potential guardian could be Sirius Black's spirit. Even though he died, his love for Harry could be so strong that it allows his spirit to act as a guardian. He could appear to Harry in times of need, give him advice, and even use his limited spectral powers to protect Harry from minor threats.

Well, in some 'Magical Guardian Harry Potter Fanfiction', one interesting concept could be the unique magical abilities of the guardians. For example, they might have powers that are a combination of different Hogwarts houses' traits. They could be extremely loyal like a Hufflepuff, yet brave as a Gryffindor when protecting Harry.

McGonagall as a guardian might also involve her protecting Harry from the darker forces in the wizarding world more directly. Instead of just being a teacher, she could be the one to shield him from certain Death Eaters or threats. She could use her Animagus form to secretly follow Harry when he's out of Hogwarts and make sure he's safe.