Who is a prominent nationalist composer from Spain?

Granados is a prominent nationalist composer from Spain known for his contributions to the classical music repertoire, particularly in the context of Spanish nationalism. His works often reflect the rich cultural heritage and musical traditions of Spain, incorporating elements of Spanish folk music and dance forms. One of his most famous works, "Goyescas," showcases these influences and is heavily tied to the Spanish identity.

In the broader context of musical nationalism, Granados stands out as a key figure representing the Spanish experience, especially in the late 19th and early 20th centuries when many composers were seeking to establish a national identity through their music. This movement focused on drawing inspiration from folk melodies, rhythmic patterns, and cultural themes endemic to Spain.

While Copland, Holst, and Harris are significant composers in their own rights, their contributions are not primarily rooted in the Spanish nationalist tradition, making Granados the most fitting choice for this question.