Great list Fran....mine is probably a bit longer who knows...lol
Soon what we have today will be a thing of the past also...
The only Roland arrangers misssing from my list are...E5,10,15,16, and VA76, also GW8, BK9, and BK7m..and 3 series from VA,EXR,and BK..
I should mention there were some E series like the E16 that were not sold in USA..I did forget to mention the EM 15,25..
I don't think you are going to top my Roland list