Disable all resizing and compression

Question

Turns out I was never too far off.

Adding this to your functions.php will stop all resizing and compression of images uploaded to the media folder

add_filter( 
    'big_image_size_threshold', '__return_false' );
add_filter(
    'jpeg_quality', function($arg){return 100;} );

    update_option( 'medium_size_w', 9000 );
    update_option( 'medium_size_h', 9000 );
    update_option( 'large_size_w',  9000 );
    update_option( 'large_size_h',  9000 );

Hope this helps someone

Thanks