I wont give you any songs from bands that are on your list, so if I skip over some good ones (Arcade Fire are my favourite band ever), that is why. Also, songs marked with an * are alt-country songs. Can be classified under indie, but is for the strong willed indie.
Modern Guilt - Beck
Gold Mine Gutted - Bright Eyes
American Hearts - A.A. Bondy*
Hello, I'm In Delaware - City and Colour
Souled Out!!! - Conor Oberst
Wolves In The Garden - The Deadly Syndrome
Black History Month - Death From Above 1979
Summersong - The Decemberists
European Oils - Destroyer
I'll Be Your Man - The Elected*
My Moon My Man - Feist
The CN Tower Belongs To The Dead - Final Fantasy
Blue Eyes - Good Shoes
Your Rocky Spine - Great Lake Swimmers
What We Had - The Handsome Furs
Jarhand - Immaculate Machine
If - Islands
Midnight Surprise - Lightspeed Champion
Orchids - The Lovely Feathers
Strange Days - Matthew Good
Bukowski - Modest Mouse
Star Witness - Neko Case
Use It - The New Pornographers
For Real - Okkervil River
Ways To Come Home - Sebastien Grainger
New Slang - The Shins
The Underdog - Spoon
All Fires - Swan Lake
The Start of Something - Voxtrot
Textbook - We Are Scientists
Fancy Claps - Wolf Parade
Just a warning though, this list may be almost TOO indie for you. But give it a listen.