Of Jamaican, Spanish, and English descent, FKA (which stands for formerly known as) Twigs makes some pretty game-changing, experimental music. While her performance style isn't for everyone, you can't say FKA Twigs isn't pushing boundaries.
Her alt-r&b debut album, LP1, marries simple melodies and trippy percussion. Some tracks tend to be overly robotic and a little monotonous, but songs like Pendulum and Two Weeks offer more syncopated, thought-provoking rhythm. If you're into Grimes or Jessie Ware, take a listen to this track and see if it fits your fancy.