Don't worry. All hail Castiel. Winchesters are best.
Dean seems more Hufflepuff than Ravenclaw. Like, he has his street smarts but that's because if his upbringing. Just like why he would be Gryffindor. Have you seen Dean? He wuvs hugs. And Cas would be Ravenclaw and it would be a romance that all of Hogwarts would know about, like Lilly and James