I don't know if I can remember many movies by name but there are several scenes that I can't just forget easily.
The Lion King - when young Simba finds his father lifeless with confusion written all over his face, made me to cry in that movie.
Titanic - Jack freezing in the water is the most tragic farewell that I've seen between two lovers.
Avengers: Endgame - Iron man's death hit me so hard that I felt moody for couple of days.