To be responsible, his creation is romantic.
Goethe and Schiller's early works can be said to be romantic, but with the advancement of historical trends, they jointly established "Weimar Classicism". In fact, their later works, although called classical, are also full of romantic spirit, especially Goethe.
Goethe's life has experienced three stages in the history of German literature: violent movement, classicism and romanticism, and he is the main representative of German classical literature. However, his works and his life are very romantic. Faust >:< Young Werther are all romantic masterpieces.