Robert Picardo might be the best actor on the show. I remember reading in an interview that he was a little bummed at first about getting cast as The Doctor, since he originally auditioned to play Neelix, but he quickly realized that he was actually gonna be the show's Spock/Data/etc (which he previously assumed would go to Tim Russ). Then he really leaned into it. It's such a great performance and he has such a great capacity to emote. On the occasions when he gets full on angry (like in Author, Author) he can be downright scary!
Quoting this from a slashfilm.com article:
Robert Picardo had a lengthy and storied acting career. He was a Joe Dante regular, appearing in "The Howling," "The Explorers," "Innerspace," "The 'Burbs," "Matinee," and "Gremlins 2: The New Batch." He appeared in "Star 80," Ridley Scott's "Legend," the zombie cop film "Dead Heat," and Robert Englund's directorial debut "976-EVIL." This was all mixed in with plentiful TV work and multiple appearances on stage.
