There's Moxy Fruvous and Barenaked Ladies, of course (BnL are fairly well known here, Fruvous less so except for a few hits) - I was specifically thinking Blue Rodeo because they did a few lovely pieces with Sarah McLachlan and they're kind of folk/country/rock. Newer stuff: Tegan and Sara, The Weakerthans, Holly Cole (she's more jazzy, but her Tom Waits tribute album is really nice too...)