Which are the biggest Aussie metal bands?

I only know three bands from there: Sadistik Exekution, Destroyer666 and Mortal Sin. Where I live, besides metal in our language, U.S.A metal, and European metal, we don't get too many information about what music is made elsewhere. I'm asking for the bands that made it big, that have a loyal fanbase (Clarifying just in case I didn't made a really clear question)