Smeg Head
Just take a bite
You are clearly missing Savage Garden from that list.Generally the best Aussie bands and artists have had success overseas like ACDC, INXS, The Church, Silverchair, Gotye, Kyle Minogue etc.
They were all original though unlike Chet Faker, there's nothing special about him that would make him a worldwide success.
I'm just filling in for Silent Alarm
Nothing saying you have to be big to be good.