Not really for visual but for camera work:
The Survivors. E-D Vs. the Husnock ship. And while the E-D's massive phaser/torpedo spams are a classic, what really gets me is after the second volley fails and the ship is hit yet again.
The camera is directly in front of Worf, giving a disastrous damage report while frantically typing, Riker and Picard stand up with immediacy, Riker calls for medics, and Picard gives a look that says he's not surprised that he's clearly outgunned but still has a sense of "oh shit" to it. The way the camera takes one long pan from Worf's typing to Riker and Picard's quick stand just really gave a sense of intense urgency.
The camera is perfectly framed, the pull back is well paced, the actors show a good amount of defeat, and there was no fx required for that single shot. Well done, Mr. Director. Well done indeed.