http://www.keirsey.com/sorthat.aspx
I'm a typical Gryffindor and an INFP. I've taken many, many Myers-Briggs type tests and know a good bit about them.
Idealist = ENFP ENFJ INFP INFJ = Gryffindor
Rational = ENTP ENTJ INTP INTJ = Ravenclaw
Guardian = ESFJ ESTJ ISFJ ISTJ = Hufflepuff
Artisan ESFP ESTP ISFP ISTP = Slytherin
Look at it from a different perspective
smile The only type that I can say for certain is rationals being Ravenclaws. It might not fit every Ravenclaw (Luna, for example. She's probably got an F in her type), but it fits the definition.
So everyone's different and is in their house for a reason *nods*