You have been there. You create a Salesforce report with killer content only to be underwhelmed by the report formatting options in Salesforce itself. Some folks may have paid for add-ons to make the formatting of these reports more automated. You may be using Tableau to import the data and make the output more visual and elegant. You can try XL-Connector or G-Connector for Salesforce, which will allow you to retrieve your report right into Excel or Google Sheets, and keep the formatting consistent from retrieve to retrieve. I have had good luck with both of these.