I use Soho, supports custom domain, plenty of good features, it's like £12 a year and EU based / privacy focused.

mailinabox gives you email, calendar, tasks, and nextcloud apps if you're willing to setup your own VPS and suffer through some setup, about $10-20/month

migadu.com, it's a Swiss company with servers in France (great privacy laws). You can host multiple domains and unlimited mailboxes on the same account, which starts at $20/year. They limit on numbers of emails sent/received (200/20/day on the smallest account) and on total account space (5 GB smallest), not on features. You can host multiple domains, multiple mailboxes, multiple aliases, individual login per mailbox, TLS connections, IMAP/SMTP/POP/webmail and all the features you can think of.

Zoho is a good alternative.

I signed up for MailRoute lifetime* account when Google threatened to pull the grandfathered free workspace account.

It’s fine, I email using Spark everywhere anyway. Spam filter could be better. Other than that, everything is back to normal.

I like skiff.com you can forward your Gmail address to it and make email aliases for free.