Which musician in known pimarily for his work with his band, John Mayer or Tom Johnston?
John Mayer:  Together, they formed a short-lived two-man band called Lo-Fi Masters. Tom Johnston (musician): Charles Thomas "Tom" Johnston (born August 15, 1948) is an American musician. Tom Johnston (musician):  He is a guitarist and vocalist, known principally as a founder, guitarist, lead vocalist and songwriter for the rock group The Doobie Brothers, as well as for his own solo career.
Charles Thomas "Tom" Johnston