If he was healthy and still had the curse seal, he'd be Top 20. Imagine if he became older, more developed, and stronger? His durability would be insane. How will you stop a guy who can't even be crushed under hundreds of tons worth of sand? His body itself is like an ultimate defense. Taijutsu is basically useless against him because he can make bones come out of his body instantly to stab you. Only way to beat him is to fight from a distance, unless you're Raikage. If he were still alive, he'd be very dangerous.