Common Guide-lines:
-Harry doesn't need to be friends with the Weasley in question (I cannot possibly fathom him being bff.s with Percy);
-Ginny must always be one year younger than Harry and his Weasley companion (or not depending on what you do) because of the events in CoS;
-Ginny must also be more and more girly the less older brothers she has (Lavander/Parvati level with only Bill, normal if Fred and George are Harry's age);
-The age differences between the Weasley brothers must remain the same: Bill-2 years older than Charlie-4 years older than Percy-2 years older than Fred/George-2 years older than Ron;
-Wormtail must always be said Weasley's pet or come with a two years younger brother;
-Harry only gets access to the Marauder's Map if he is the same age as the Twins;
-Malfoy will be more and more antagonistic the highest number of Weasley brothers exist, with mild dislike towards Bill and undiluted hate towards the twins, or slightly friendly if Harry doesn't like the Weasley;
-If Harry isn't friends with a Weasley, he must be friends with Neville.
-Friendship with Hermione is optional;
-Weasleys mould Harry's personality. Details in each Challenge.
#1 - William Weasley
-Bill is confident and intelligent;
-Bill is a good chess player;
-Harry gets more confident and a temper;
-Snape doesn't hate Harry quite as much because his personality will be closer to what the fandom perceives Lily's to be;
-They will study a lot, compete for top DADA, Harry will top Charms and Potions, Bill will top Ancient Runes and Arithmancy;
-Bill won't have bouts of jealousy and will believe in Harry;
-There is no Dragon Tamer brother, get creative with Norbert(a) or take him(her) out altogether;
-Bill will notice something wrong with Ginny early on, but Harry still has to deal with the Basilisk;
-They travel to Egypt, Wormtail is seen in the Daily Prophet and Bill gets interested in Ancient Runes and Arithmancy;
-Bill helps Harry in the Tournament;
-Harry and Bill co-teach the DA;
-Bill starts a long distance relationship with Fleur.
Optionals:
-Harry/Hermione;
-Bill learns the Patronus with Harry;
-Harry becomes a Curse Breaker with Bill;
Charms and Bill
Harry was content.
He had a friend in the form of Bill Weasley, he was talented in some school subjects (as discovered after Bill made him study with him), he could eat as much as he wanted in the Great Hall and he didn't have chores. There was only one tiny pesky detail.
He was famous.
As in, country level famous.
Not the real him of course. The small, a bit shy and glasses wearing boy, but the son of Lily and James Potter, the Boy-who-lived.
It wasn't terrible of course. He just had to prove that he was talented by his own achievements and as bright as his parents were said to be instead of relying on something he didn't remember doing. Even if he suspected that dream with the green light and cold laughter wasn't as much as a dream as he thought at first. However, it still annoyed him that people didn't see Harry. Just Harry.
Except for Bill of course, who just entered his compartment on the train, asked if he knew how to play chess and made him play with him. It had been somewhat funny when, after four hours, Bill remembered that he hadn't introduced himself and blushed in embarrassment. It had been funny as well when Bill didn't connect him, Harry, with The Harry Potter, and only did so during the sorting ceremony.
"How did you do that?"
Harry turned around to find Hermione Granger looking at him intensely.
"How did I do what?"
"The feather float of course!" She looked a little annoyed for some reason.
I looked at Bill and he grinned. "Well, there is this thing called magic..."
"Not that!" Now she really looked annoyed "I mean, how did you do it right on your first try! Professor Flitwick said that it hadn't happened for years! The last person to manage it was a Muggleborn named Lily Evans who-"
"Was my mother." Harry interrupted grinning "Not everyone is talented at everything Hermione. I seem to be good at charms, however, you were the first to transfigure a match to a needle. That happens. I just might have gotten my mother's talent towards charms."
"Of course you did Harry, you were the first and you managed to help me get it right too!" Bill said happily "Let's go to the Library, we have homework to do." And he dragged Harry away.
The professor had compared him to his mother.
Yes, Harry was very content indeed.