I struggle with this too.
My knowledge so far:
There is no official way to delete particular profiles.
I could think of the following options:
- try via https://privacyui.cloud.adobe.io/
- Identify the batch(es) in the dataset(s) and delete it (sounds not practical)
- copy all datasets to new datasets without the particular profiles and delete the old datasets afterwards (weird)
- mark those profiles as deleted (with a custom XDM field) and wipe PII by ingesting dummy data to this identity.
Happy to hear the opinion of the AEP experts.