Nice! Three artists I have never heard of in the least! The Wallows have some great rock sound, they should do pretty well. I know it's the current style the vocalist is using, but I would like to hear a bit harder edge of him. They could be pretty good!
Clairo was a nice sounding group, I really kind of liked them. I kind of like the fact that she was using a corded microphone rather than the wireless, a bit of retro there!
The Marías I'm going to have to check out some more, that was kind of trippy video with the underwater look. That really is pretty impressive, I'm sure you can do anything with software anymore, but I'm a dinosaur!
I remember being in elementary school and they wanted to impress on us how big the number one million was. So they dragged out the school computer which was probably a dinosaur at the time to and input x=x+1 . It took nearly a day for the thing to count to a million. How times have changed!
Great recommendations, I'll have to check out the Spanish songs from The Marías!