If anyone else is coming across this issue, this is how I resolved it:
I got help on this other post to make it happen.
Made a Multi-row column, set it to 'Enhanced rich text'
In PlumSail Org Chart Configuration, under Templates, Display as 'rich text', it worked without needing to use HTML.
While it's not dynamic to each employee profile, it significantly simplified our org chart.
As you can see here, we have 11 people with the same job title reporting to the same person.
I've made the job title the first line, with a multiline rich text column the field for staff names, allowing for this larger list.
