who has more skill  Serj Tankian or  Layne Staley
Serj Tankian Serj Tankian (Western Armenian: Սերժ Թանկեան , ] ; born August 21, 1967) is a Lebanese-born Armenian-American singer-songwriter, composer, multi-instrumentalist, record producer, poet, and political activist with Armenian descent. He is best known as the lead vocalist, songwriter, keyboardist, and occasional live rhythm guitarist of the metal band System of a Down, formed in 1994.
Tank Tyler DeMarcus Lamon "Tank" Tyler (born February 14, 1985) is a former American football defensive tackle who played last for the Dodge City Law of Champions Indoor Football (CIF). He was drafted by the Kansas City Chiefs in the third round of the 2007 NFL Draft. He played college football at North Carolina State.