I think they meant from a production/operation standpoint, not screen-time role.

Probably half the episodes had a “real” scene - non-comedic, with a character dealing with some real emotion. Trust being broken, death, abandonment and more. I rewatched the first 7 seasons recently and it as sort of wowed at how they switched from comedy to dramatic moment quickly, and it was as usually Harry. Quite a talent, I think mostly because he wasn’t an “actor” in the traditional sense.