He was one of the original correspondents on the long-lasting 60 Minutes, and despite some controversies (such as being sued for libel by General William Westmoreland after an interview for the CBS special The Uncounted Enemy: A Vietnam Deception) his work has inspired many journalists, broadcasters, and media professionals.
He was brave enough to finally talk about his long battle with depression, and that's one of my strongest memories of him. So many people suffer from that dark torment, often in solitude, and it's a positive thing any time a public figure steps forward and shares what they went through -- and most importantly, how they survived.
Christopher Plummer portrayed Wallace in the movie The Insider, and did a fine job, even though it wasn't a very flattering depiction. Wallace himself apparently disliked it and argued that the Vanity Fair article on which it was based wasn't an accurate account of his role in the whistleblowing incident that it chronicled.
Wallace used his investigative reporting skills to expose social and political demons while battling personal ones. As he once said, "Shake it off and get back in there." May he rest in peace.