I think The Skrzatusz Sanctuary organ has a good sound so here is a simple hymn tune by William Henry MONK which seems to get an airing in a variety of settings.
I've recorded three verses. The first is a setting by Dr J V Peters 1920 - 1973. He was an organist and teacher here in Adelaide South Australia. Just to help you recognise the tune after the variation, the final two verses are straight from No.13 Hymns Anchient & Modern New Standard.