Great place to start with Kundera:

https://archive.org/details/the-unbearable-lightness-of-being

Hesse, so many. As a young man this is a good start: https://archive.org/details/DemianHermannHesse_201905

Heller, the classic. A single paragraph could have me laughing, gasping in horror, and then in tears by the end: https://archive.org/details/catch2201hell