Here's some stuff that can help with Congregational Songs and shouting music:
Alternate minor 1 and minor 2 chords
Key E
D-G-B or E-G-B (start high on keyboard, go all the way down, go all the way back up)
C#-F#-A
B-E-G
A-C#-F#
G-B-E
F#-A-C#
(repeat)
Alternate major 1 and minor 2 chords
Key E
E-G#-B (start high on keyboard, go all the way down, go all the way back up)
C#-F#-A
B-E-G#
A-C#-F#
G#-B-E
F#-A-C#
(repeat)
Various Bass Lines
Key E
E, G#, A, A#, B, C#, D, D#, E
E, F#, G, G#, A, C#, D, D#, E
E, G#, B, C#, E, C#, B, G#, E
E, G#, B, A#, A, C#, D, D#, E
E, D, B, A#, A, C#, D, D#, E
E, C#, B, A#, A, C#, D, D#, E
E, F#, G, B, A, C#, D, D#, E
E, F#, G, G#, A, G, F#, F, E
E, F#, G, G#, A, G#, A, A#, B, D, E, G, A, C#, D, D#, E
B, C, C#, G, F#, C#, B, B, E
B, A#, B, C, C#, C, B, A, A#, C#, E, G, F#, E, C#, E
E, D, C#, G, F#, C#, B, C#, D, D#, E