Listening to your favorites, the only ones I can think of with similar vibes are Zee Avi and maybe the Suckerpunch soundtrack, but honestly I don't think they match all that well. It's like a genre of music I'm not at all familiar with.
I'm more into (alt) rock, which is why I'd recommend Nico Vega, Meg Myers, or Jessica Hernandez and the Deltas, just to list some more names I haven't seen yet. Alice Merton leans a little more pop I think, and Rebecca Black (yes, best known for Friday) much more so.