Never cared for “The Exorcist”, but I loved “The French Connection”.
One of his better, and lesser known films, is ‘Sorcerer’ from the late 70s. White knuckle film about transporting a truckload of unstable dynamite sweating nitroglycerin through the South American backcountry.
The Iraq sequences at the beginning of the Exorcist were wonderfully filmed. Friedkin knew how to set up excellent camera shots.
Fried king (that’s what autocorrect called him) was not an auteur and had more misses than hits.
I myself liked The Night They Raided Minskys when I was young.