I'm more familiar with Southern music (Argentina, Chile, Brazil, Venezuela and others) than with Northern which is nearer to you, but if I can be of any help, let me know. There are tons of folk and tango and classical music made in these latitudes that can be of interest to you. I don´t mention it frequently because I would not like to be bothering to people, but I can assure you that there are tons.
I agree "Hispano" does not include Brazil, but "Latin" or "Iberoamerican" include it.
Un abrazo - Andrés (from Buenos Aires)