Hope and Faith - The band that Kerry Livgren, the guitar player and writer of the majority of Kansas songs, formed along with the Dave Hope who was the bass player for Kansas, is called "AD". They are one my favorites too, along with Petra, REZ, Deagarmo & Key, and others mentioned here.
This Mother's Day evening Greg X. Volz, the former lead singer for Petra, will be at our Church here in Louisville Ky. We are very excited!
Glad you brought up Kerry Livgren. His album seeds of change which is a Christian record features among others Black Sabbath lead singer, Ronnie James Dio, in the songs live for the king and the mask of the great deceiver.
That album rocked. Can't find it on vynl anymore though.