My top female vocalists are probably Chrissy Costanza from Against The Current (https://www.youtube.com/watch?v=qbMo6mOBm8U), Lauren Mayberry from CVRCHES (https://www.youtube.com/watch?v=LDSVLQoPc8w), Lynn Gunn from PVRIS (https://www.youtube.com/watch?v=8aQz-aKvyQU), and of course LIGHTS (https://www.youtube.com/watch?v=7J-3SP_1GWE).
However, as your post is partially about female EDM vocals, here's Lynn Gunn in a song from one of my favourite EDM artists, Seven Lions: https://www.youtube.com/watch?v=XZy5dQH0xZs. Actually, there's a few Seven Lions songs with great female vocals: https://www.youtube.com/watch?v=uNQqqztmLYU, https://www.youtube.com/watch?v=ULqdjtDI-bs.
Hopefully one of those is something you haven't heard before!