Here's a few things you can do. The examples will be in the key of Eb. You can play the examples w/ or w/out a beat. Just for beat purpose, I put some time counts in [ ] to give an idea of how to play with a beat:
Idea #1
[1, 2, 3, 4] Eb / Bb-Eb-G
[1, 2, 3, 4] Eb / Cb-Eb-F-Ab
(repeat)
This is very simple, just 2 chords using the same bass note. You can use different inversions of those chords.
*Theory tidbit for those who don't Know: In music, when there is one bass note being held for more than one note, we call that a pedal tone.
Idea #2
[1, 2] Eb / Db-F-Ab-C
[3, 4] Eb / Db-F-G-Bb or Eb / Db-F-A-C
[1, 2] Eb / C-Eb-G-Bb
[3, 4] Eb / Cb-Eb-F-Bb, Ab
(repeat)
This is more of a variation on Idea #1 that really brings some color to your playing. Here I'm utilizing that pedal tone idea, but playing even more smoother & "phatter" chords to compliment that bass note.
Idea #3
[1, 2, 3, 4] G / F-Bb-D
[1, 2, 3, 4] F / Eb-Ab-C
[1, 2, 3, 4] Eb / F-Bb-D
[1, 2, 3, 4] Ab / Ab-Bb-C-Eb
(repeat)
You can use different inversions of those chords and add little runs to it for improv. This is a little progression taken from the song "Ignite My Fire" by William Murphy.
Idea #4
[1, 2, 3] Ab / Eb-Ab-C
[4] Bb / F-Bb-Db
[1, 2] C / Ab-C-Eb
[3, 4] D / Bb-Db-F
[1, 2, 3, 4] Eb / Bb-Eb-G
[1, 2, 3, 4] G / F-G-Bb-Eb
(repeat)
This is just a little progression u can use when people are crying out to the Lord or worshipping.
Idea #5
[1, 2, 3] Ab / Gb-Cb-Eb
[4] Gb / Ab-Db-F
[1, 2] Cb / Bb-Eb-Gb
[3, 4] Eb / Ab-Db-F
(repeat a few times)
[1, 2] Ab / Gb-Cb-Eb
[3, 4] Bb / Ab-Db-F
[1, 2, 3, 4] Eb / Bb-Eb-G
In another thread in the Gospel Hangout room, they were talking about "borrowed" chords. Well, here is a prime example of using "borrowed" chords, specifically the b6 & b7 chords.
Idea #6
[1, 2, 3, 4] Db / Bb-Eb-G
[1, 2, 3, 4] C / C-Eb-Ab
[1, 2, 3, 4] Cb / Cb-Eb-F-Ab
[1, 2, 3, 4] Bb / Bb-Eb-G
(repeat)
Anybody who knows anything about gospel music has heard this progression before in MANY songs. There are so many variations and things you can add to this til it ain't even funny.
Is that enough Ideas for ya? I can post more if yall want em.