Maybe they could bring back that couple that was always on the Dawn from Boston to Bermuda. They seemed to be popular based on folks here asking about them. We even sailed with them and they were pretty good and probably low cost. Plus they probably shared a room.
If less is more, maybe find the guy we had on DCL Wish. He wore a fancy tux (placate those who like formal wear), sang, did comedy, and had one of those talking dolls - all in one show. That covered the 4 year old contemporary cruiser all the way to gramps. Plus he had a late night raunchy version.