There are at least 4 acts who are using or have used the name Pessimist; 2: a blackened death metal band from the USA, 3: a German thrash metal band and 4: a Czech progressive death metal band.
1. Drum and Bass project, UK. Kristian Jabs, also known as Pessimist, aged 20 is a Drum & Bass Producer/DJ from Bristol. He has been producing since the age of 15 and has recently become one of the scenes most prolific newcomers of the underground. A distinct style and not conforming to predictable trends has earned Pessimist a respectful reputation in Drum & Bass.