Keep in mind that iCloud locked devices are usually lost or stolen. You will not get a lot of answers on this forum regarding these types of devices. However, because you are not asking to circumvent the lock and we don't know how you came to be in possession of this device, I will say the following:
You could migrate your logic board and screen assembly to the housing that isn't bent.
Follow this guide:
iPhone 6 Logic Board Replacement
@oldturkey03 , @jayeff, @mayer, let me know if you are not comfortable with this answer. I have one or two iCloud locked devices myself that come from close relatives who, for the life of them, can't remember their AppleID passwords. They got new phones and created new AppleID's. Not every iCloud locked device has a sinister history.