Those two novels of Nylund's really captured the "dark forest" concept well, though I won't say more so as to avoid spoilers.

I haven't read the source material so I can't speak to the books, but the adaptations of 3 Body (Problem) that I've watched, both the Tencent and Netflix ones, also explore similar themes to Nylund's works. Heck, I just discovered that Liu Cixin coined the "dark forest" term, though he isn't the first to explore it.