Thank you Ryan and Ludwig for your responses. The client ask is kind of unique. They want a Consolidated GLTB, but want all the records exportable to a single Excel sheet. That's why MR doesn't work in this scenario. When you export from MR, it puts each company's results into a separate tab in the Excel file. Also, they don't want the entire concatenated account string description exported, only the Main account name. This screenshot shows the format they want to see the export in:

Ludwig, as to why would I propose ER for this? I'm just researching options, given that MR doesn't do the trick. But I agree with you, ER would be a pretty complex report design.
Bottom line, the client used Dynamics GP before implementing Dynamics F&O, and were spoiled by GP's SmartList and the fact that all their legal entities were contained in a single GP database.
Ryan, if you can prove me wrong on my perceptions about MR not being up to the task, I'd be more than happy!