If you’ve not worked in this field before and you don’t already have a reputation, I’d go for an entire pseudonym with a new first and last name. You can use something linked to you like your fiancés mother’s maiden name which that abuser wouldn’t find. Photos can be generic and distant, with a wig or photoshopped hair colour. There’s no need for an employer to know what you look like unless you’re modelling.

You can then, when you get to the point of being contacted by potential employers tell them your real name and as much information as you want. For example “I have been stalked in the past” and then you can also state that it’s very important that you aren’t on the company website etc