Explore - Add data filter to show only agents and not end users?

I've tried a number of options but can someone please advise how to add a data filter on a dashboard in explore so that it only shows true Agents and not all the End users?

The report itself has a filter to only include 5 agents and only "Agent" roles:

 

The data is filtered correctly, but on the dashboard, when I add a Data filter it's showing every single user in the system, when I only want the 5 agents I've selected in the report filter...

 

 

Thanks,

James