Protonmail looks really nice. I might get that to add another email account.
I currently purchase Office 365 “Exchange Only” from Microsoft for my family. I registered a personal domain and it costs me $4/month per mailbox. I get all the same business features (Exchange mail, calendar, etc.) that corporations get and as it’s not a “free” service, I don’t see any ads.
I’ve never taken a liking to how Gmail’s user interface is set up. I use Outlook and before that — many moons ago — Eudora for email.