I agree that great music comes from struggle, not contentedness. To my mind, Contemporary Christian is, except for the lyrics, almost identical to Adult Contemporary. With few exceptions (Lulu Roman Smith comes to mind), it is boring in the extreme.
In the history of Christian Rock, I can only think of two songs that are in any way memorable: Norman Greenbaum's
Spirit In The Sky and Switchfoot's
Meant To Live.
Likewise, there have been a few Christian songs from secular artists that are quite beautiful, like Judy Collins'
Amazing Grace (among other secular versions of this song) or the Nitty Gritty Dirt Band's version of
Will The Circle Be Unbroken?
For some reason, I find myself wanting to mention Lucinda Williams' marvelous
Get Right With God, but I'm not sure I'd call that a Christian song. I don't know what Lucinda's intent was, but the song seems to be a friendly spoof of June Carter Cash.
I have yet to hear any example of White Southern Gospel music that was listenable, with the possible exception of one or two songs by the aforementioned JCC. Black Gospel is a completely different story. One of my favorites is from the summer of love (1968) and was a moderate hit on pop radio: The Edwin Hawkins Singers'
Oh, Happy Day. Even the most jaded athiest would be hard pressed to sit still while that song plays. It is absolute magic!