I'll go with PTA also. He still shoots his films anamorphically, whereas many like Fincher, Scott, Mendes, et. al, shoot Super-35, which allows for some additional visual information in a 4:3 version.
Of course, the composition is what's important, and whether Panavision or Super-35 is used is irrelevant to that, but I think the films of PTA and others who use Panavision would look worse in pan and scan than a director who uses Super-35. In fact, I missed Magnolia
in theaters so I rented the
since it came out a month before the DVD did, and in one scene they had letterbox bars temporarily scroll into the image because there was just no way they could have done it with pan and scan. If only it could have been that way for the whole movie!