Today I tried to find out different variations to accompany the march Lord Mayo. Starting point was the video by Matt & Shannon Heaton. Matt plays Gm-Chords with Capo on 2nd fret. Then I found the version of the Floating Crowbars. They play Dm-Shapes with Capo on 7th fret. So I had 2 different approaches. Then I thought, how it would sound with Am-shapes without capo and tried different chords.
So at first here are some possibilities without capo, maybe you'll find some more:
Not every attempt sounds good to everyone, so you have to decide what suits you.
Here are some chords that might be useful in Am:
Now lets look at Gm-shapes with capo on 2nd fret. First here's the video of Matt & Shannon Heaton. Lord Mayo starts at 42:20.
Now let's look at the recording of the Floating Crowbars. They use Dm-shapes with capo on 7th fret:
I really like the intro and groove of this accompanyment. Here's a tab for it:
And possible chords: