I just created this table-builder in less than half an hour 
It’s not a plug-in, or something; just a structure builder - where every structure is a table-cell.
To keep things simple, rows are added automatically and tfoot / thead are not supported.
Individual cell can be swapped in the panel and you have a live preview of both the table-structure and some of the cells-content.
I can upload the code, if you want.