I solved it in a different way

1. I created a custom post type for the users profile
2. I added a hook after user registration, which is adding a new profile entry
automatically with the user information

So each user has a post in the custom post type profile and there I can add
any type of additional information as Logo and files etc.

Works really fine for me

You can try to hack into the render-form.php file and make some custom adjustments there with the counter.

if($counter == 1) {
// make large field
}else{
// make small field
}

that is what I was doing. Trying now to add a WYSIWYG Editor in the second column