I don’t know whether this (quite old by now) macro solution can be modified so that columns display not just the text from a field, but the calculated output of a filter… And I suspect that Jed Carty is not hanging out here on this forum these days (certainly not by that name).
I do know that Shiraz dynamic tables — a current and feature-rich variation on that theme by @Mohammad — can work with column templates. You can tell it that all the cells under the Summary column header should display a certain way…