The following is based purely on my own ideas as to how to build a gold medal squad.
Taylor Hall-L, Sydney Crosby-C, Claude Giroux-C/R
This line should create absolute havok on the opposition. It has it all, speed, size, playmaking and goal scoring.
Patrick Sharp-L, Jonathon Toews-C, Steven Stamkos-C/R
Toews and Sharp will make life hell for the opposing forwards, while Stamkos can use his speed and shot to take maximum advantage of Toews playmaking abilities.
Erik Staal-C/L, Patrice Bergeron-C/L, Brad Marchand-C/R
My 'shutdown' line, with Bergeron and Marchand to kill penalties and hound the opposition, while Staal uses his massive frame and skill to bulldoze opposing defenders.
Jamie Benn-L, Mike Richards-C, Martin St Louis-R
Spare: Jordan Eberle.
A group of utility forwards who can be moved up or down the lineup (i.e. feel free to put Martin St Louis on any other line and bump someone else down).
For all the forwards I placed a premium on skating and two-way ability. Rick Nash, Ryan Getzlaf and John Tavares are excellent NHL players, but I don't want any of them trying to keep up with the Russians on the big ice. Guys like Sharp and Marchand - who won't ever make an All-Star team, are especially valuable in short series like the Olympics where their ability to skate and shut down opposition players will be in high demand, someone has to kill penalties and shadow the opposition.
Kris Letang - Jay Bouwmeester
Duncan Keith - Shea Weber
PK Subban - Drew Doughty
How good is your defense corps when Shea Weber is the worst skater of the 7? Pretty awesome depth at the blueline. No Brent Seabrook or Karl Alzner types, as I don't see them being as baluable as the guys who skate at an elite level. JBo may be a surprise, but he has loads of international experience and still possesses absolutely fantastic skating ability.
Order them however you want, but I think Luongo earns the top role and gets the bulk of the starts.