I was just looking around on wiki and i found a few semi well known indie artists that may be easy to get.
Matt & Kim (songs you might know include Daylight, Good Old Fashion Nightmare, and Lessons Learned)
They are on Fader Label (a small indie label that only has a few artists)
Mumford & Sons (songs you might know include Little Lion Man, and The Cave)
They are on Glassnote Records (an indie label)
Two Door Cinema Club
Also on Glassnote Records
their newest album is on their own label Upbeat
Coconut Records (songs you might know include Summer Day, and Microphone)
They are a band founded by Jason Schwartzman and are on Jason Schwartzman's record label, Young Baby Records.
Yeasayer (song you might know is Ambling Alp)
They are on Secretly Canadian (an independent record label based in Indiana)
Pink Spiders (songs you might know include Little Razor Blade and Gimme Chemicals)
They are on their own label Mean Buzz Records
Peter Bjorn and John (songs you might know include Young Folks, Amsterdam, and Nothing to Worry About)
They are on Wichita Recordings (an independent label located in london)