I had a similar experience at one time.
We straightened out everything but also addressed the issue of why these accounts were overdrawn, etc. because it is not right and cannot continue.
Some might be errors yet charges may have accrued that need to be reversed.
Other overdrafts might be purely from fees. Check to see if any of these accounts would work better as zero balance accounts that fund off of a parent account, etc.
Get to the root of the problemm and it will save a lot of work in the long run.