Edvard Grieg
Edvard Hagerup Grieg (15 June 1843 – 4 September 1907) was a Norwegian composer and pianist, widely considered one of the leading Romantic era composers.
His use of Norwegian folk music in his compositions is stated to have contributed to Norwegian romantic nationalism. However, the leftist Wikipedia in various articles cites a letter regarding music for one scene in Henrik Ibsen's play Peer Gynt that was critical of exaggerated Norwegian romantic nationalism, apparently trying to imply that Grieg was an anti-nationalist. Encyclopedia Britannica states that "Grieg, a founder of the Norwegian nationalist school of music, had reservations about Ibsen’s irreverent play, and he only reluctantly accepted the invitation to write music for it".