What are some other “foundational” works like William Gibsons Neuromancer or J. R. R. Tolkiens Lord of the Rings?

This week I finished Mona Lisa Overdrive by William Gibson, and with it, the Sprawl Trilogy. Ever since I read Neuromancer, i have been recognizing its influence everywhere. To me it feels like Neuromancer and Lord of the Rings are very similar in that they are foundational works in their genres, and you can see [...]