Ah, let's see, Brazilian artists? the big one that comes to the forefront for me is the progressive metal band Angra. I have a wonderful discography collection playlist of the bands content available to me as a U.S. subscriber, not sure how much of the content is available and the same for other users in other regions?
You can check the playlist out below if you wish, the discography collection is only missing the band's last major live album release, which for some odd reason has not been on the artist page for some time for U.S. subscribers, Angels Cry 20th Anniversary Tour.
Brazil has a huge and wonderful music collection and there are several artists and amazing bands of all musical styles. I trully recommend a band called Vanguart, you can check this playlist with some songs of amazing Brazilian artists.