Another vote for Fastmail. They also have a very simple one-button import option for your gmail emails. The web UI is fast and simple. I love it. I tried Proton

Another vote for Fastmail. They also have a very simple one-button import option for your gmail emails. The web UI is fast and simple. I love it. I tried ProtonMail, but there are numerous drawbacks because of full E2E (Must use their email clients on mobile, web client on web and bridge on desktop. Migration from ProtonMail requires to use their beta software. Full text search doesn’t exist - yet).