For email hosting service, I don't think there are any email services specifically tailored or extra relevant to building personal brands. Things like a proclaimed security focus and ability to use your own domain are common features among many services. Fastmail, ProtonMail, Zoho Mail, etc.
If you actually mean you're looking for an email marketing/newsletter sending service, I personally use and have been happy with Mailerlite. It has reasonable price points (with a free tier), automation, lets you use your own domain, and lets you section subscribers into different tags easily. Deliverability is improved if you use your own domain rather than a generic free email (which Mailerlite does not recommend).
regarding the newsletter aspect, I appreciate the suggestion as its going to be my next item.
The privacy laws are worse in Australia. Google is far ahead in every respect, it seems to me: security, AI-based spam prevention, etc.
If that's a concerned with FYEY, other options exist (like protonmail or tutanota), but they aren't as polished as Fastmail.