Results of Apps Script tutorial to combine multiple worksheets to a master sheet. It will also work when column positions don’t match.

function combineData() {
  
  var masterSheet = "Master";
  
  var ss = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(masterSheet);
  var lc = ss.getLastColumn();
  var lr = ss.getLastRow() > 1 ? ss.getLastRow() : 2;
  
  ss.getRange(2, 1, lr-1, lc).clearContent();
  
  var labels = ss.getRange(1, 1, 1, lc).getValues()[0];
  
  
  labels.forEach(function(label,i){
    var colValues = getCombinedColumnValues(label,masterSheet);
    ss.getRange(2, i+1, colValues.length, 1).setValues(colValues);
    
  })
  
}


function getCombinedColumnValues(label,masterSheetName) {
  
  var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
  
  var colValues = [];
  
  for([i,sheet] in sheets){
    var sheetName = sheet.getSheetName();
    if(sheetName !== masterSheetName) {
      var tempValues = getColumnValues(label,sheetName);
      colValues = colValues.concat(tempValues);
    }
  }
  
  return colValues;
}


function getColumnValues(label,sheetName) {
  
  var ss = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetName);
  var colIndex = getColumnIndex(label,sheetName);
  var numRows = ss.getLastRow() - 1;
  var colValues = ss.getRange(2, colIndex, numRows, 1).getValues();
  return colValues;
}


function getColumnIndex(label,sheetName) {
  
  var ss = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(sheetName);
  
  var lc = ss.getLastColumn();
  var lookupRangeValues = ss.getRange(1, 1, 1, lc).getValues()[0];
  
  var index = lookupRangeValues.indexOf(label) + 1;
  
  return index;
  
}

Understand How This Script Works

Add the following code to your Apps Script Editor first and then use the function.

/**
* Imports JSON data to your spreadsheet Ex: IMPORTJSON("http://myapisite.com","city/population")
* @param url URL of your JSON data as string
* @param xpath simplified xpath as string
* @customfunction
*/
function IMPORTJSON(url,xpath){
  
  try{
    // /rates/EUR
    var res = UrlFetchApp.fetch(url);
    var content = res.getContentText();
    var json = JSON.parse(content);
    
    var patharray = xpath.split("/");
    //Logger.log(patharray);
    
    for(var i=0;i<patharray.length;i++){
      json = json[patharray[i]];
    }
    
    //Logger.log(typeof(json));
    
    if(typeof(json) === "undefined"){
      return "Node Not Available";
    } else if(typeof(json) === "object"){
      var tempArr = [];
      
      for(var obj in json){
        tempArr.push([obj,json[obj]]);
      }
      return tempArr;
    } else if(typeof(json) !== "object") {
      return json;
    }
  }
  catch(err){
      return "Error getting data";  
  }
  
}

How to Use IMPORTJSON Function?

Understand How This Script Works