As chain restaurants go, Popeye’s has some darned good biscuits. Love mine with some salt and honey! :)
Bojangle’s biscuits are the best I’ve tasted from the fast food genre. But that’s a pretty localized franchise. They have good chicken and sweet tea, too.
Around July 4, they make red, white, and blue biscuits - strawberries, blueberries in the biscuits topped with drizzled white glaze.