This is based on opinion. Please don't list it on a work's trope example list.
Tear Jerker / The Remains of the Day
When Stevens is so absorbed with his butlery that he isn't able to really care about his father's death. Not only that, he seems to take considerable pride in it when reflecting on the fact later.
The scene where Miss Kenton, upset by Stevens' lack of reaction to news of her engagement, cruelly claims that she and Mr. Benn make fun of him on their dates. Though he makes an appearance of being mildly confused, it's impossible to think that he isn't deeply hurt.