List of unique names from from different columns

Hello all. I have formula that I would like to give me a list of unique names from 4 different columns. I created a table called list that contains the cells in the columns I would like to search. It isn't giving me a result. I have the same formula working in other cells but I can't get it to work here. I've attached the workbook and the formula is on the Record Scores Here tab and in cell J2.