Snow Strippers and Dorian Electra are some of the better hyperpop acts to come out in the past few years. 100 Gecs should be a given, but only their first two projects, I didn't care much for 10,000 Gecs. For more mainstream artists/sounds, M.I.A.'s third album MAYA and Emo-tion by Carly Rae Jepsen are two great 2010s alternative hip-pop albums.

ETA: I recently rediscovered Time 'N Place by Kero Kero Bonito and I genuinely consider it to be the best alternative pop album of the decade so far. I'd definitely recommend it