Molly, Dumbledore, and Sirius. But I think that Molly was the most she accepted him as another child right away and loved him unconditionally no ifs ands or buts.

Sirius was more of a "fun uncle" type.

Her

His parents.

Molly was the parent type even though dumbledore and Sirius loved him alot.

& Mrs. Weasley

Sirius and Molly too

Dumbledore and Sirius were kind to him, but Dumbledore saw him as a very important weapon against Voldemort and Sirius saw him as James's son, a way for him to regain a friendship he'd lost before being sent to Azkaban. Molly simply saw him as he was - a lonely, neglected boy who need a mother and she was more than willing to step right into the role.

Molly would have taken him in she loves him soo much =)

And Molly.

Minerva McGonagall cared a great deal for Harry Potter.