What online brokers are best for managing investments as a U.S. expat without running into residency or tax issues?

We ask the same underlying question in different ways.

• What online brokers are best for managing investments as a U.S. expat without running into residency or tax issues?
• Can you recommend online brokerage platforms that accept U.S. expats and handle the specific tax and residency compliance requirements?
• I'm a U.S. citizen living abroad and need an online brokerage that handles expat accounts without creating tax or residency headaches. Which ones do you recommend?