If you are happy with the xlsx format, try my GitHub projectlibrary, EPPlusEPPlus. It started with the source from ExcelPackage, but today it'ssince became a total rewrite. It
It supports ranges, cell styling, charts, shapes, pictures, named ranges, AutoFilter, and a lot of other stuff.
You have two options:
EPPlus 4, licensed under LGPL (original branch, developed until 2020)
EPPlus 5, licensed under Polyform Noncommercial 1.0.0 (since 2020).
From the EPPlus 5 readme.md:
With the new license EPPlus is still free to use in some cases, but will require a commercial license to be used in a commercial business.
EPPlus website: https://www.epplussoftware.com/