Bill is a Gringotts curse breaker, seeking out adventure and working with dangerous and tricky co-workers. He then became an active member of the Order. He’s intelligent, yes, but so’s Hermione.
Charlie works with dragons. He deliberately chose to work with some of the most dangerous creatures in the magical world.
Percy may be an idiot, but what did Dumbledore say?
It takes a great deal of bravery to stand up to your enemies, but a great deal more to stand up to your friends.
Percy stood up to his entire family in order to support what he thought was best for the wizarding world. He was wrong, and he was disloyal, but that was brave.
He was also brave enough to admit when he was wrong and come back to help.
Fred and George were always willing to put themselves on the line to aid their friends (like when they made the swamp to distract Umbridge), and all those jokes and tricks take a certain amount of innate confidence and bravery. They also both campaigned to be in the Order when they were under-age and fought bravely in the Battle of the Seven Potters and the Battle of Hogwarts.
Ron. It boils my blood when people say Ron wasn’t brave. Ron stood on a broken leg to defend his best friend from a murderer. Ron sacrificed himself on the giant chessboard. Ron fought bullies like Malfoy and Snape. Ron faced up to his fears and insecurities when he stabbed that locket.
Ginny may have been a shy first-year, but she grew into a woman who stood up for the bullied, who was itching for a chance to help in the Battle of Hogwarts and fought with her friends at the Ministry.
The Weasley kids. Gryffindor through and through.