Compare names in multiple excel documents

I have a lot of excel documents that have two columns. Last names (column A) and first names (Column B). Some of the documents have multiple worksheets with the same information. I want to compare all of those names in each file with a master HR excel file that has all the current employees once again in the same format (column A has last names, column B has first). If there is a name that matches a name in the HR list then I dont need anything to be done. But if there is a name that is on a given list but not in the HR list then I want that to be written to a new excel document with a similiar name as the original file. I would want the output format to be the same (2 columns, last name, first name) I need the script to automatically go through each excel document (inluding mulitple worksheets if they exist for a given document) in the folder. budget from 30 - 60 dollars