Got Ravenclaw. It's been a number of years since I've seen a Harry Potter flick, but I can't remember Ravenclaw from the movies at all. Were any of the famous characters in that house?
Luna Lovegood.- probs the most prominent of Ravenclaw.
Cho Chang.- brief love interest of Harry, iirc. ends up dating Cedric Diggory. iirc she's only a secondary character around in the Goblet of Fire movie and otherwise has nothing to really do with the plot.
Moaning Myrtle.- the dead ghost girl.
Filius Flitwick.- one of the professors and current head of the house.
Quirinus Quarrel.- dark arts teacher in the first film. evil scumbag.
Gilderoy Lockhart.- dark arts teacher in the second film(?). massive idiot.
Garrick Ollivander. - the wand shop guy. not that important but hey, he somewhat stands out.
Sybill Trelawney- one of the professors, not that important but still a character that was noticeable for her unique appearance.
Of those characters listed the most prominent would probs be Luna, Quirinus and Gilderoy.
For the record, my house, Hufflepuff only has a few notable characters too.
Pomona Sprout- one of the professors and current head of the house.
Nymphadora Tonks- pretty prominent badass.
Cedric Diggory- was only in the one novel but still had a major role in it.
The only other 4 Hufflepuffs I can find are super minor background characters with few lines who end up being part of Dumbledore's Army. The most prominent of those being Hannah Abbot as she ends up being Neville Longbottom's wife sometime down the line.