Vanguard is one of the cooler-structured brokerages. Vanguard (the management firm) is owned by the mutual funds themselves, of which you are an investor of. So their shareholder obligation is genuinely towards "clients" of the individual mutual funds. As far as I'm aware, this is the only mutually-owned mutual fund firm.

It's definitely got a solid track record and good fees, but these are things I'd feel weird about advertising it on HN for.