The Top Donors Report provides a list of the top donors of all time. 

Please go to CRM and on the grid find a column named "Cumulative Received Amount".  Please click on the name of the column and when doing so you will have the option to sort by ascending and descending.  

You can save this exact filter by entering a name into the Filter Name over to the left.

Once you are satisfied with the results you can go under Actions and export all the data to Excel, you can send this group a text message, create an email list and/or prepare a mailing all right from the grid.