No director probably ever had three films back to back as good as William Friedkin (who just died at age 87) did in the 1970s. The French Connection, The Exorcist and Sorcerer are each truly great films that stand the test of time. The first two made a ton of money (justifiably). The third one didn’t, but has one of the greatest, tensest scenes of all time.
Friedkin let the success of those first two go to his heads, and then a string of flops (including Cruising, a film that, like The Last Temptation of Christ, alienated its only potential audience) put him out of favor in Hollywood.
He also directed a pretty swell episode of the 1980s Twilight Zone reboot.
He had a wealth of talent, I just wish we had more first rate films from him.