Not Chelsea music, but when I saw Ioanna Gika open for Deafheaven, I got a lot of Chelsea vibes. She put out an album today and its really really good. Messenger is a real standout.
Looks like we'll hear something very soon if the album is done. And yes, seconding the above comment, Ioanna Gika is probably my favorite album of the year so far and highly recommended for Chelsea Wolfe fans.