Looks like a good place to mention one of my childhood heros, Jean-Claude Tremblay. Orr aside, probably the best defenceman in postseason play in the 60s and early 70s.
In 1966 he led the Habs in postseaon scoring with 11 points in 10 game on the way to the Cup, all the while playing as sound a game defensively as anyone around. He was considered a prime candidate for the Conn Smythe but that was the year they started to give it to losing goaltenders as sort of a consolation prize.
In 1971, coming off a season that had him finish fourth in scoring on the Habs, ahead of folks like Richard, Lemaire and Pete Mahovlich, he got 17 points on the way to yet another Cup, potting the Cup-winner for good measure. Once again he lost out on the Smythe to a goaltender. Some university kid with 6 NHL games under his belt when playoffs began.
More than just an offensive defenceman, Tremblay was airtight defending his end. Great skater, puckhandler and able to hit a moving target from anywhere on the ice. And then there were the penalties he killed almost single-handed. One of the smartest players of his generation and one of the most underrated.