Sure, you could use the comment_form_field_comment
filter to inject content (extra fields or whatever) above the comment field:
function comment_form_field_comment_add_field( $field ) {
$new_field = '<p class="comment-form-extra"><label for="extra">Extra Field</label> <input id="extra" name="extra" type="text" value="" size="30" aria-required="true" required="required"></p>';
$field = $new_field . $field;
return $field;
}
add_filter( 'comment_form_field_comment', 'comment_form_field_comment_add_field' );
You could also switch that around to put the new/extra field below the comment field:
$field = $field . $new_field;
Screenshot with twentyfourteen: http://b.ustin.co/1dvho