Today I've figured out how to play the outta this world song "Oh Happy Day" by Edwin Hawkins Singers (1969). It's very simple, but also very effective on the guitar. Many people, myself included, have experienced the burst-into-tears irresistible shock to the system upon hearing this song (I first heard it when I was a young kid), so I feel it's really worth our time learning how to perform it.
The opening lick alternates between B minor and E major. It then switches to alternating between A major and D major, until it switches to brief F#7, and then back to B minor/E major.
The bridge (in double time) is E7 and then A major/D major vamp, ending in E7.
Simple, and so incredibly beautiful. Enjoy!