Another band that was recently introduced to me was Wake Owl. They're so hipster they don't even have a Wikipedia page.
Heathers. These are another favourite of mine. They're twins from Dublin, Ireland (yes they're irish, partly why I love them so). Seriously though, if harmonizing was an Olympic sport they would win gold every time.
I could go on for a while, but I don't want to bombard you with songs, so I'll leave you with these. I hope you enjoyed them!