Well, I finally figured out the only way to get it to work was to modify the SQL to as follows:
SELECT 'Blank', 'Networth'
FROM jos_NetworthQuartile
UNION ALL
SELECT 'Blank', QRank
FROM jos_NetworthQuartile
UNION ALL
SELECT 'Blank', ORank
FROM jos_NetworthQuartile
Even though this should really be a 1-line SQL code since we're just creating the most basic chart.
Would be useful if there was a guide that actually walked through these areas and how to troubleshoot.
Would be even more useful if Support existed. Still, the product is a good bridge between FusionCharts and joomla.