I also think the movie Notting Hill was written by and about an ISFJ. It's a romantic comedy, but if you've seen it, the two main characters aren't very wordy. It's every one of the characters circling around them who are talkative and rather zany. The protagonist and his love interest tend to speak in a quiet, terse manner almost expressing themselves implicitly. And they spend much of the film hiding away together though she's a movie star.
The film is chalked full of ISFJ themes like modesty, warmth, and there's just a general quietness to it.
Plot:
William Thacker, a travel bookstore owner living in Notting Hill, is barely making ends meet. He rents out part of his house to a lodger whom he considers the "stupidest git" in the world. His personal life is equally in shambles because, although he has a small group of dear friends, he is divorced - she left him - and has no prospects of love on the horizon. His life changes when into his bookstore walks American, Anna Scott, the most famous and attractive movie actress in the world. Against the odds, Anna and William develop a romance. But the odds of being together are still stacked against them as they live in two different worlds.
[YOUTUBE="FLJri7eueXQ"]Trailer[/YOUTUBE]
I've known a few ESTP's who took a liking to this film and they don't generally go for romantic comedies. But I think some ISFJ's will get a kick out of it if they haven't seen it before.