German:
* Ludwig Bechstein: Known for his collection "Deutsche Märchen" (German Fairy Tales), published in 1845.
* Johann Fischart: A writer and poet who collected and re-told folk tales in the 16th century.
* Franz Xaver von Schönwerth: Collected Bavarian folk tales and published "Sagen des Bayerischen Volkes" (Legends of the Bavarian People) in the 19th century.
* Heinrich Zschokke: A Swiss writer who collected and published German folklore in the 19th century.
International:
* Charles Perrault: A French author known for his collection "Tales of Mother Goose" (1697), which included classic fairy tales like Cinderella and Sleeping Beauty.
* Madame d'Aulnoy: Another French author who wrote fairy tales and published her collection "Fairy Tales of the Time Past" in 1698.
* Hans Christian Andersen: A Danish author known for his own collection of fairy tales, published from 1835 onwards.
* Joseph Jacobs: An English author who collected and published English folk tales in the late 19th century.
* Andrew Lang: A Scottish author who collected and published fairy tales from around the world, including "The Blue Fairy Book" (1889).
This is not an exhaustive list, but it provides a good overview of the contemporaries of the Grimm brothers who were also actively collecting and publishing fairy tales during the 19th century.
It's important to remember that while these authors were contemporaries, their approaches and styles differed. The Grimm brothers focused on collecting authentic folk tales, while others like Perrault and d'Aulnoy were more focused on adapting and re-writing them for a literary audience.