Hans Ziller (born 18 May 1959) is a German musician, known as the founder, lead guitarist, backing vocalist and primary composer of the 1980s melodic hard rock band Bonfire. He founded the band Cacumen (a predecessor of Bonfire) as a teenager in 1972. In 1989, in the middle of working on Bonfire's third album Point Blank—which, like the earlier albums, was produced by Michael Wagener—Ziller left the band because of insurmountable differences with the management and the rest of the band and began a project of his own called EZ Livin'. In 1993, he continued with Bonfire.