I've read 3 out of those 5 books, and I see our preferences differ. For instance, I've a few books from Van Vogt, and I can't imagine I could like anything he wrote.
- "A voyage to Arcturus" tried hard at being strange and philosophical, but it seemed shallow and I did not feel interested.
- "The worm Ouroboros" was better, with a very unusual epic style, both in writing style and in the story. But some points made me cringe, e.g. the focus on nobles and the despise of common people, even heroic characters. Then it got repetitive, with a final trick that felt like a mockery of the whole story.
- "The dying Earth" was a good book, but it is far from my favorites. I prefer continuous novels to collections of short stories, even when they share a common setting. The book sometimes felt like a poetic tale, with nature and nostalgia as strong themes, though it was also quite brutal.
Since anonymous suggestions aren't very useful without any context, I'll match little-known books with famous books:
- If you thought that "1984" had good ideas, but also many stupid parts that spoiled the whole book, then try two older books. "We", by Zamiatin, is a bit old and naive but enjoyable. It was a source of inspiration for "Brave new world" and "1984". The Swede "Kollocain" (1940), by Karin Boye, is excellent, and much more subtle than the latter.
- If you like collections of related short stories, like "The dying Earth", then "The carpet makers" (1995) by Andreas Eschbach is a must. I remember the joy when I finally had a global understanding of the whole situation.
- If you wish for bizarre fantasy, not the epic Tolkien style, not even the dark saga of Ouroboros, but something more gothic and unsettling, then Mervyn Peake's "Titus groans" is perfect.
- I think "Brain twister" (1961) is the only funny book I've read in SF-Fantasy-supernatural.