BigBankVertical
A nice easy mod. I think it is good for a first attempt. Put all bank slots into two vertical columns with coinage at the bottom with a done button.

Mainly did this to fit in with Xym UI. I really love that one all my characters use that UI. Not really the place for it but you are a master.

Install instructions: Replace the bigbank window in your custom UI folder with this one. Please backup your current one incase you don't like it.