Percy Weasley
Reasoning: The Page of Wands/Gryffindor is a leader - of being brave and enthusiastic, of confidently pursuing your path even when it differs from what is normal or expected. It is focused on success and opportunities. Former prefect and head boy Percy Weasley has always been ambitious and driven by challenge and being successful - his path towards the Ministry was a divergence from his family and what they wanted him to do. Even though in the end it turned out that Percy had been grossly mistaken in following the Ministry, you can't deny that it was gutsy and courageous to follow his goals for as long as he truly believed they were correct. And when he finally realized that the Ministry was wrong, he bravely left them and followed what he then believed to be right: fighting Voldemort and the Ministry alongside his family.
In a traditional tarot deck, this is the Page of Wands.
Notes