Append Calculated Tables (Not in Edit Query)

I am working with Data Quality Dashboards. In order to avoid doing my initial selection using Python before uploading the tables into Power BI (can be tricky for my end user when I hand things over), I am trying to do it all inside the tool. Therefore I create various CALCULATETABLE functions to spot the entries that are violating my business rules. Ultimately I want to have one OVERALL VIOLATIONS table.

The only function I know to append tables is UNION. However, it does not allow me to append more than two tables at a time. Consequently, I have to merge two at a time until everything becomes one main table. Do you happen to know a more effective way of doing this?

Thanks in advance!