Are any USD based stablecoins giving the risk free yield?  Currently sitting at ~2%

Define risk-free

There is a non 0 risk of interacting with any smart contracts relative to holding money in a bank account

I personally like to stablefarm instead of using a vault. Balancer is currently 6% on USDC/USDT/DAI on Arbitrum. For a vault I saw 3% on Alchemix the other day but front end isn’t loading for me rn

Good point I was referring to a service that would take USDC and deposit into something like VMFXX so underlying deposits are safe.  You still have smart contract risk