Complex sentence: Following these two critically acclaimed pictures, Friedkin, along with Francis Ford Coppola and Peter Bogdanovich, was deemed one of the premier directors of New Hollywood; but Friedkin's later movies did not achieve the same success.
Split into simpler sentences: Following these two critically acclaimed pictures, Friedkin, along with Francis Ford Coppola and Peter Bogdanovich, was deemed as one of the premier directors of New Hollywood. Unfortunately, Friedkin's later movies did not achieve the same success.