Parry's "Jerusalem" is one of if not the most emotionally rousing hymn ever composed. I've never heard it played on guitar. Got a link? If not the choir, e.g. Kings, always full orchestra accompaniment. e.g. Proms.

"I Vow To Thee My Country" by Rice set to music adapted from Holst's orchestral suite "The Planets: IV -Jupiter, the Bringer of Jolllity" is another which can't not stir the emotions.