It's interesting to compare the number of famous individuals born in two vast peripheral countries, Brazil and Russia. Charles Murray's 2003 tabulation of the 4002 most eminent names in the arts and sciences up through 1950 lists 135 individuals born in Russia versus only one born in Brazil (composer Villa-Lobos).
The two countries aren't really that comparable, though -- Brazil's population in 1900 was 17 million, compared to Russia's population of around 130 million.
On the other hand, there really weren't many famous creative figures in Russia before Pushkin's emergence in the 1820s, and then there were many world-famous writers; then, a little later, composers; and, finally, painters.
So, perhaps we're about to enter a new golden age of Brazilian artists and scientists. Stranger things have happened in the history of culture.
You can see one source of pro-Russian bias in that there are eight writers listed who were born before Pushkin, yet I haven't heard of any of them. I suspect that they get mentioned a lot in the reference books that Murray used to build his lists because scholars want to mention the predecessors of Pushkin, Lermontov, Gogol, Turgenev, Tolstoy, Dostoevsky, and Chekhov in order to make a coherent story out of the history of Russian literature by providing the big names with predecessors who influenced them. In contrast, since there aren't any Brazilian writers who have made themselves world famous, there is no need to clutter up references books with the names of lesser earlier Brazilian writers who influenced them.
Fame breeds fame and obscurity breeds obscurity.
In case you are wondering, there are only 11 Portuguese on the list of 4002, one scientist and 10 writers, mostly of the wealthy 16th Century, with Camoens being the best known.