Hi @Mhpoulsen,
I agree with @gelflex-cc, we typically use Other for churned customers.
We also do what @Mhpoulsen mentioned and create a custom property that will allow us to better define what “Other” is. In that case we can create workflows, lists, or filters based on the combination of the 2.
For example a list that pulls all contacts with lifecycle stage of other and the “Other” type is equal to “Churned”.