You'd need to save the tagged records as a filter or group, but then you could go to the canned dashboard, Management|Activity Summary Dashboard and select your filter or group at the top.
How about a standing report that lets you select your company(ies) and your date ranges in a dropdown, but has a standard layout for the events you're viewing? Could include any fields in GoldMine pending or history tables, plus anything in the contact1 or Contact2.
Here's one with the Company selector rolled down
Each row links back to GoldMine, so you can pop either the GoldMine record or the activity itself from inside the report.
Also, you can drag the fields around to any arrangement, add other fields, include activity notes, etc.
Here's a sample where you choose one or several companies at the top and see the results below.
Tim, thanks for the chance to work with you - glad we were able to get you to the end result you needed with SQL, Groups, and Automated Process.