First, why would you want just one non-jar candle burning (I'm assuming you have column candle holders)? Usually you have two or more candles burning.
Second, why would you want more than one scented candle burning? It would be overwhelming.
Third, high quality scented candles are high in essential oils and I don't think they would behave like a conventional beeswax column candle - you traditionally let a scented candle burn to the wall of the jar while a column candle is extinguished before that to create its own intrinsic wall, and I think that a high oil-content wax would droop more and be more difficult to maintain.
If you're hell-bent on such a "look", then freeze a new scented candle in its jar and then hit it upside down into the palm of your hand and the shrunk candle will pop out. Otherwise, get a jar candle and then place some decent unpurified beeswax columns (ivory to pale amber in color) to use as a light source.