POP QUIZ: Music Edition

I've been listening to Spotify a lot lately, trying to find new music. Luckily it makes recommendations. Lots and lots and lots of recommendations. Some of these band names, though... ugh.

Today's quiz: Four of the following names are fake. Your job, WITHOUT CHEATING, is to identify the fakes. Enjoy!

The Slow Wonder

Talks Of Butterfly

Walkaways

Pearl and the Beard

Phosphorescent

Cloud Cult

Say Hi To Your Mom

kettleblack

Frightened Rabbit

Tennis

Railroad Earth

Clap On

Dark Autumn Hour

Civilian

UPDATE: One of the fake names I made up is ALREADY a real band. Bonus points for guessing which one.

UPDATE 2: Answers posted in reply to R.E.V.'s comment. Why his? Because he is a disgusting man-beast and can use any positive attention you can muster.

UPDATED 3: Make that two fake names that are actually real bands. I am in the wrong line of work.