I really think you should re-address your idea on a theoretical framework. It's difficult to imagine that a new set of income tax rates would address extreme wealth or address the crises of capitalism regardless of the numbers you have in your spreadsheet. For example, OP suggests using total wealth as a tax base to alleviate inequality which would be a new way of approaching the issue.
If you'd still like to use income tax rates to approach inequality, I would suggest starting with high negative percentages and increasing them through your table. Kinda like this:
base * { -99%, -98%, ....., 99%}
Sorry if this comes off as harsh, I appreciate that you're looking to for a way to address these issues.
This is the image you went with?