For WGO, what I can make out so far is IMaj7 vim7 iim7 V7 IMaj7 etc., a typical jazz-style progression
so:
EMaj7 C#m7
EMaj7 C#m7
f#m7 B7 (B7sus4?)
EMaj7 C#m7
etc.
bridge and outro roughly Am7 to EMaj7--still working on that
You know, that Am7 to C#m7 (or, EMaj7, as you say) vamp is a great opportunity to invent some new bepop solo technique. Few pop songs have ANY cool changes, so, this really represents a gift to the simpleton, like me, who really needs to be dragged kicking and screaming beyond a nice minor key wanking, haha!!
Please do check that
ending on Mercy Mercy Me also (the song proper uses the same chords as the previous song). It's similar, but a little more involved, with strings. Maybe tomorrow I'll be able to get to work on that. I really love that very ending with that minor scale with the voices.
Also, I got a really cool 70's Funk setting on the GT-6 guitar box,... this setting should satisfy both the guitar and organ/string 'atmosphere' of the song. I am currently totally obsessed with 70's funky guitar effects settings.
I really love that standard EMaj7 soul atmosphere,... ahhhh,...