High Quality Content by WIKIPEDIA articles! Jon Coghill (Jonathan Robert Coghill, born 26 August 1971) is an Australian drummer best known for his work with Australian rock band, Powderfinger, although he has also toured with Regurgitator. Coghill replaced Powderfinger`s original drummer Steven Bishop in 1991 when Bishop wanted to pursue further studies. At this time, Powderfinger had not made any recordings, and as such, Coghill has been the group`s drummer for all of their releases.