Make the territory owner the account owner

Summary:

As sales team members have changed, we now have accounts that have multiple team members but they are not supposed to be team members anymore. We implemented territories and have now all our customers mapped by territories (we did it manually). This solves the problem of the correct member having access to the right accounts, however unless we manually delete them from the wrong accoutns they still have access.

Is there a way to make the territory owner the account owner by default or running a process. Ideally deleting all the existing members. We want to be able to only change the territory members and that having an impact in all acounts.