Plugin for Custom Tables

I was wondering if anyone can point me in the right direction for a plugin, or instructions, on how I can create a custome table.

I know there are quite a few table plugins, but I want to make a table that has different amount of rows in each column. All the ones I have found put the same amount in each column. The reason I’m needing this is because I’m trying to create a pedigree spreadsheet. I have also tried the couple family tree plugins that are out there and those won’t work for me.

This is my website https://premiereroux.com/

Thanks!