Formula to import multiple columns to 1 column if a name from a different list matches any name in those columns - google-sheets

Question

Looking for a way to import a long range of columns in to 1 list if a name from a different list matches any name in that particular column. I've tried a couple variations of query, filter, vlookup... Can't seem to find the right combination. Example..
List A on sheet 1 contains the names Jim, John and James. On a separate sheet, there are 5 columns containing names. Column 1 contains Jim, Alex and Ben. Column 2 contains Harold, Bob and Jimmy. Column 3 contains James, Jeremy and Felix. Column 4 contains James, Eric and Evan. Column 5 contains Sara, Jamie and Xavier. The end result should display the list in 1 column to contain the names - Jim, John, James, Alex, Ben, Jeremy, Felix, Eric and Evan. Columns 1, 3 and 4 would be imported to a single list because at least 1 name within those columns matched a name in the original list.
Example sheet.

Answer 1

UPDATED
You can try this sample implementation below using Apps Script custom function. Just copy and paste it to your spreadsheet file as a bound script:
NOTE: This script will check each name listed on the "Main List" & if each of them has matches on multiple columns on the second sheet Sheet2, then it will place all of the names on columns that contains any matched name on the "Imported List". The only catch using this implementation is that it'll run a bit slow when there's a huge amount of data to be processed.
SCRIPT
function onOpen(){ //Runs every time you open the spreadsheet
FINDMATCH();
}
function onEdit(){//Runs every time you make an edit to the sheet
FINDMATCH();
}
function FINDMATCH() { //Function to check each columns on "Sheet2" to see if it has names that match any names on the "Main List"
var main = SpreadsheetApp.getActive().getSheetByName("Sheet1");
var mainList = [].concat.apply([], main.getRange("A4:A").getValues()).filter(String); //Main list data starts at A4
var sheet2 = SpreadsheetApp.getActive().getSheetByName("Sheet2"); //Name of the Sheet2
var result = mainList;
for(col=1; col <= sheet2.getDataRange().getLastColumn(); col++){
// E.G. if you only want to set the maximum of 2 rows as seen below, the "currentCol" code will only scan range A1:F3 on Sheet2 because the number 3 on the third parameter of the getRange() method will be the maximum row to be scanned.
var currentCol = [].concat.apply([], sheet2.getRange(1,col,2,1).getValues()).filter(String);
mainList.forEach(function(list){
currentCol.forEach(function(data){
if(data == list){
result.push(currentCol.toString());
return;
}
});
});
}
var data = FILTER(result.toString().trim().split(","));
main.getRange("AG4:AG").clearContent(); //Clears the old "Imported List" data before pasting updated list of names
main.getRange(4,33,data.length,1).setValues(data); //Updates the "Imported List"
}
function FILTER(array) { //Function that filters duplicate names
var data = array;
var newData = [];
var formattedData = [];
for (var i in data) {
var row = data[i];
var duplicate = false;
for (var j in newData) {
if (row === newData[j] && row === newData[j]) {
duplicate = true;
}
}
if (!duplicate) {
newData.push(row);
}
}
newData.forEach(function(i){
formattedData.push([i]);
});
return formattedData;
}
Sample Result:
Sample Sheet
When spreadsheet gets updated with new data