Making usefull excel templates

I'm looking for someone to help me create useful Excel templates for data analysis and for consulting data like prices,… I'm not sure if the template should include macro functionalities, so I'm open to suggestions. I do have an existing spreadsheet that I can use as a template, but I'm sure it can be made better. If you've got the know-how and experience to help me out with this project, please reach out. Thanks!