I have used Autometer and now run an Intellitronix led gauge.
https://www.intellitronix.com/fuel
I had some fuel accuracy issues and the reason for the gauge swap.

I found that it really matters if your sender is accurate as well. As for the fuel level anxiety, the only real way to know is to fill up your tank and drive the car until it runs out of fuel haha!

I was driving back from Big Willow to Norcal and ran out of gas at the 250 mile mark. Luckily it was right at an exit with a gas station. I filled up and my supposedly 22 gallon fuel cell only fit 17 gallons, so 14.7 mpg. I hadn't filled the fuel cell completely and the foam takes up some space reducing the capacity.