Question: is gryffindor a good house?
Answer: The houses are not anything by themselves, it is about every individual and their deeds. And yes, for the Gryffindors , Gryffindor is the best house, for the Ravenclaws, it is Ravenclaw and likewise for all houses. And for us all Hogwarts is the best! Glorify the good in all the houses, belittle none!