No, they are not aggressive at this time. They have nothing to protect - they are just moving into a new home and don't have any honey.
Sadly, these bees have just committed suicide. There is no way for them to build comb and get enough honey stored for them to survive the winter with you being in Ohio.
At this point, I'd be surprised if there is any beekeeper that would want these this late in the year.
I would suggest you watch what they are using as an entrance, and once they die over the winter, in early April close their entrance and get everything caulked up. They will eat through what little honey they do make and you won't have to worry about any mess from oozing honey.
But you will have to close up the entrance (and any other entrances) early next April, or you will end up with a new swarm moving in.