Have musicians Stza and Conrad Lant both been members of a band?
Stza: Scott Sturgeon, also known as Stza Crack ( ; born March 4, 1976), is a musician who has fronted several ska-punk bands in the New York City area, the best known being Choking Victim and Leftöver Crack. Conrad Lant:  He is the vocalist and bass player of the influential Thrash metal/black metal band Venom, from 1979 to 1989 and from 1994 to present.
yes