Spiritual but not 'religious' bands

Been thinking a lot about bands like Kansas, Supertramp and The Killers, where most casual listeners may be oblivious to the fact their music is informed by their religion/spirituality/deep philosophical ideolgies, etc., and wondering what other bands fit the bill.

Not looking for Christian Rock or any sort of overt religious messaging, but bands that delve into a deeper topics like existence, spiritual journeys, the metaphysical, but also can be casually listened to without feeling like being preached at.

And no, not Stryper.