While it hasn’t launched yet, Beam (meetbeam.com), a bay area start-up is claiming to offer 2-4% APY with FDIC insurance. Although it looks like there will be some hoops to jump through and there currently is a waiting list to join:
https://www.forbes.com/sites/laurengensler/2017/09/18/high-yield-online-savings-account-beam/#7c335b3e3531
I figure it will at least be worth investigating upon launch.
Moderator note: link edited to remove referral information.