He has also worked with a wide variety musicians including : Bill Laswell , Bootsy Collins , Bernie Worrell , Iggy Pop , Les Claypool , Serj Tankian , Mike Patton and Viggo Mortensen . Buckethead was a member of Guns N ' Roses from 2000 to 2004 . He has collaborated extensively with a wide variety of high profile artists such as Bill Laswell , Bootsy Collins , Bernie Worrell , Iggy Pop , Les Claypool , Serj Tankian , Bill Moseley , Mike Patton , Viggo Mortensen , and was a member of Guns N ' Roses from 2000 to 2004 .