E. S. Posthumus is a "band" - really a pair of composer brothers who create epic orchestral music. Think music from the Lord of the Rings or Pirates of the Caribbean soundtracks, but composed purely for your enjoyment. I own their album Cartogropher. The remix disc is the best and the more purer form of their work.
Many of their songs have been licensed to be used in movie trailers, because of the escalating nature of the music.
E.S. Posthumus on YouTube.
Picture Credit: E.S. Posthumus