Wasn't a film role, but I saw David Hyde Pierce in "Curtains" on Broadway, which is set in the Colonial Theater in Boston. His character was a local police detective who gets caught up in a backstage murder investigation, and I was very impressed with his subdued Boston accent. He knew just how far to take a dropped R, he did not pahk his cah in Hahvahd Yahd, and--most importantly--he nailed the short A sound. "I'll call the chief" sounded like "I'll coll the chief". Nobody non-hacky remembers to do that. Point: Pierce.