Stanislaw Lem was far too much of a genius to believe his works were directed by any sort of committee, communist or otherwise.
He is still overlooked far too much - people seem to regard Solaris as his only work of note. But he has so works, all bizarre, imaginative, and insightful. Fiasco and His Master’s Voice are two of my lesser known favorites.
The Invincible, Solaris, and Eden all deal with the question "what if aliens are truly alien, and we cannot find any points of contact with them?"
Even his lighter work (Cyberiad, Ijon Tichy) is very insightful
And outside of Sci-Fi he was still an absolute powerhouse. "Hospital of Transfiguration" is an absolutely haunting novel that you will keep thinking about for months later if not years, and "Journals found in a bathtub" is on a different level.