Some good bands/artists:
Classic
The Beatles
Violent Femmes
David Bowie
The Who
Frank Zappa
R.E.M
Sonic Youth
The Police
Talkingheads
More Recent
Plants and Animals
The Flaming Lips
Radiohead
Angus and Julia Stone
The New Pornographers
Patrick Watson
Vampire Weekend
Whitest Boy Alive
Beck
Metric
The Weakerthans
Tegan and Sara
Sam Roberts
Sarah Harmer
The Strokes
Karkwa
Feist
Great Lake Swimmers
Broken Social Scene
AAH! I could go on forever. Literally. There are probably three times this many artists in my Itunes library. These are my basics.