Godspeed You! Black Emperor
Musicians, anarchists, whatever you want to call them, GY!BE are an experimental, post rock band.
Their sound is incomparable. It can be orchestral, very cinematic and has lengthy periods of slow sound that build into a crescendo of angry guitars. Vocals are replaced with spoken word that make their songs seem more like documentaries or poetry put to music. They play to a backdrop of film loops that are used to 'put the whole into context' so seeing this ensemble of musicians live will be like nothing you have ever seen.