Wells and Rosny
I found on the web (thanks, Markus) this article by Roger Bozzetto about J.H. Rosny Ainé and H.G. Wells, showing their similarities and wondering why Rosny isn't more famous as a French-speaking writer. Actually, what seems to emerge, even if I think it is never explicit (I haven't read the whole article), is that he was kind of overshadowed by Jules Verne, who belonged in fact to the old, naturalistic literary school, whereas Rosny and Wells are both "new", symbolists. The article is from 1986, but I think it's most interesting in the centennial of Verne's death.
I like Verne, but it's most unfortunate that an author like Rosny is quite forgotten. I read something written by him, and I must stay it still stands the test of time, just as Wells.