Ok. Sorry for my bad wording. The pie chart is fine. I don't see the plugin size in the list above which is where you would have to look for those plugin sizes in the "other" category.
Is it there but hidden from sight?
I think it's highly possible that you would want to remove other plugins than the largest by comparing plugin names and their size with each other to filter out those you use seldom or never and have large file size.
P.S. Maybe a list with checkboxes for every plugin. All checkboxes that are checked gives you the sum of space you will save if you delete them.