I have been hacked in the time past. But all I did was to remove the codes of the hacker and change my permission. My ranking fell and some other stuffs. Though, some images got missing like yours, but after the removal of the hacker's code, everything became normal.
If you think you can do a fresh install and import the content without any error, it's your take. But know that if the import content fails, you will have no choice than to start afresh with it.
My Sincere Apology if I'm a bit harsh on you!