Radius Bank offers 2.05% interest on a savings account as long as you have $25,000 balance, or 1.5% for balances over $2,500. It seems to be the best option I've found. (see note for fine print).
They also offer a checking account that pays 1.2% with zero fees and even waives ATM fees worldwide. These are all FDIC insured. I've been banking with them for about 6 months now and they're pretty awesome, outside of having a rather janky web and mobile app.
https://radiusbank.com/personal/high-yield-savings/
Radius High-Yield Savings is a free savings account with no monthly maintenance fee, no minimum balance requirement after $100.00 to open the account, and is FDIC-insured up to the maximum allowed. Annual Percentage Yield (APY) accurate as of 12/14/2018. Minimum amount to open account is $100.00. Rate tiers are as follows, 0.00% APY applies to balances of $0.01—$9.99, 0.05% APY applies to the entire balance on balances of $10.00—$2,499.99, 1.50% APY applies to the entire balance on balances of $2,500-$24,999.99, and 2.05% APY applies to the entire balance on balances of $25,000 or more. Rates may change after account is opened. Fees may reduce earnings.