John Williams is largely known for his Star Wars soundtrack.
He is critically acclaimed. Many people will recognise the "Imperial March" theme from Star Wars.
[You might find the song "Hymn to the Fallen" to be intense and/or emotional.]
I was listening to "Hymn to the Fallen," and I was wondering what other pieces of music were by him.
I managed to find some sources on this topic, but it would be very much appreciated if I could find general information from music sources written by music critics about his underrated tracks.
Underrated, in this answer, is defined as: being critically acclaimed by professional critics but also having received very little popular attenion in the Billboard Charts.
Direct Question: What are examples of pieces of music by John Williams are critically acclaimed but have received very little popular attention attention?