Hermione seems to feel that bravery is more important than intelligence though (she tells Harry so in the first book, before he's off to meet Quirrel on his own)
Even if Hermione might seem mis sorted but obviously she was sorted into the same house as Harry and Ron so the they way they could become closer friends, and even the eventually relationship between Ron and Hermione. Outside of Gryffindor when did you really see Harry Potter, Ron Weasley and Hermione Granger socialize with their classmates in their other houses, other then Luna Lovegood of course?
Did Professor Trelawney not think she was the brightest of her class
one professional of course didn't was Professional Severus Snape
I am surprised you don't think the Harry Potter is mis-sorted as well.
...for the greater good which is essentially what Gryffindors are meant to be all about.
I still find it hard to believe that Hermione wasn't good as something
As Dumbledore points out in the end of Chamber of Secrets that Harry Potter has some of the qualities that Slytherin students has which includes a disregards for the rules.
There is no such thing as too much time