I'm a Caps' fan, and I'd take Leetch. Gonchar is one of the best goal-scorers from the blue line, but he tends to score on his big slapshot. One-on-one, I'd think dekes would matter, and Gonchar doesn't have those moves.
I'd take him or MacInnis if it was a shot from the blue-line, though, no question.
Someone not even mentioned....Chris Chelios! That's right. I've seen him score a sick breakaway goal once, (well in 1995) but it was great. Fakes a slap then fakes glove side and goes to the back hand, ohhh ya!