Trying to set up a recurring payment to someone and looking for the stablecoin with cheapest gas fees. That they can turn into cash USD and to their bank account.
For instance USDC to coinbase and then cash.
But this is too expensive with transaction fees on Ethereum to use now.
Do coinbase accepts TRX based USDT? If so then you may go trying Tether on Tron network to save on transaction fees. Basically I am not using coinbase and I am not a fan of any of stablecoin which lead me to suggest you a different solution for your concern of saving in gas fees.
If your main goal is sending to coinbase means then you could try for any altcoin which is having lowest transaction fees and you do not need to be limited with only stablecoin. I guess these days bitcoin itself is having less than $1 transaction fees.
TRX, XRP and dogecoins are few coins you may consider for lowest transaction fees yet with decent liquidation while buying/selling.