GroupBy - avoid having to specify each output column?

Sorry to resicutate an old thread but even if you can automatically identify the value columns in the groupby node manual aggregation tab, you still can't automatically include the columns in the groups tab by forcing the exlusion.

Ex: I want to groupby + unpivot using a loop so I can do a bunch of columns and have the result all in one table. If the groupby node would just allow me to force an exclusion, the columns that change with the column list loop would be added to the groupby node and the loop would work.

Any suggestions appreciated.

Workflow is:

Column List Loop Start -----> GroupBy -----> Unpivoting -----> Loop End

with the column list loop start modifying the column that is being grouped by, which also gets unpivoted. Each loop would get appended at the bottom of the table if this worked.