A good meaty but boneless option is chuck roast, which can be cut in the shape of boneless "ribs." Flat iron steak is an extremely tender, grill-ready cut. It's more marbled with fat than a chuck ...
Before you even think about buying a standing rib roast, make sure you have an instant read thermometer, and buy one if you don't. An instant read thermometer is the most valuable and important piece ...