Here's one I posted several days ago in another thread... La Delio Valdez, a 14-piece cumbia group from Buenos Aires, Argentina.
This is their self-titled debut album released in 2012, which has a much more traditional cumbia sound than the previously mentioned cumbia group "Sonido Gallo Negro."
La Delio Valdez - La Delio Valdez (2012)
La Delio Valdez