Auto-select authors for posts during WordPress import. They must already be assigned to the project. Enable jQuery in a plugin or functions.php, and paste this in the browser console.

wp-author-import-auto-select.js

(function($){
	$('#authors li').each(function(key, value) {
		var name = $(this).children('strong').first().html();
		var re = /\s\([^\)]+\)/gi;	
		name = name.replace(re, '');

		$(this).find('select').first().children('option').each(function(){
			if ($(this).html() == name) {
				console.log('Comparing ' + $(this).html() + ' to ' + name + ".\n");
				$(this).attr('selected', 'selected');
			}
		});
	});
})(jQuery);

Thanks for this, but it didn't work for me as the author list now includes the Author login. So I modified it a bit and this worked for me:

jQuery('#authors li').each(function(key, value) {
      var name = jQuery(this).children('strong').first().html();
      jQuery(this).find('select').first().children('option').each(function(){
          if (jQuery(this).html() === name) {
              jQuery(this).attr('selected', 'selected');
          }
      });
  });

I didn't need to include jQuery as it is already included in WP-Admin. So all that is needed is to paste it into your console and hit enter.

This is confirmed working as of Nov 2021 👌