How to maintain a long filter in Gmail?

I have a set of 30+ filters for various newsletters which automatically delete the email (I want to keep the newsletters coming).

Is there a way to create a filter where I would easily add, ideally in a file, all the addresses to match?

The only thing I found is a long chain of OR in one filter, difficult to maintain (I need to add and remove addresses from time to time). Alternatively, I will write a script to manage that via the API but I would prefer to use something built-in.