Coroner

Coroner is a seminal Swiss technical thrash trio that emerged from the road crew of Celtic Frost to become one of the most sophisticated entities in extreme music. Formed in 1983, the core lineup of Tommy Vetterli, Ron Broder, and Marky Edelmann redefined the 'technical thrash' subgenre alongside peers like Voivod.

P.' , they moved into the intricate, unison-riffing of 'Punishment for Decadence', and eventually reached a peak of progressive experimentation on 'No More Color' and 'Mental Vortex'. Critical consensus often labels them 'the Rush of thrash metal' due to their virtuosic musicianship and use of odd time signatures. Vetterli's guitar work is noted for its chromaticism and jazz-inflected phrasing, while Broder's three-finger bass technique remains a benchmark for the genre. After a long hiatus starting in 1996, their 2010 reunion and subsequent 2025 release 'Dissonance Theory' solidified their status as enduring innovators who prioritize surgical precision over genre tropes.