9
The website below gives you plenty of players who wore the #1 in the NHL. Click on the related link.
Paul Bibeault - Montreal Canadiens 1942-43.Neil Sheehy - Hartford Whalers 1987-88.
There does not seem to be information on the maximum number of NHL teams in the league. However, the maximum numbers of players on an NHL team is eighty players.
As far as I know there is nobody currently wearing the number 68 but Jaromir Jagr, Milan Jurcina, and Zigmund Palffy wore it.
Jersey #99 was retired league wide when Wayne Gretzky retired, therefore no one else has had that number since he wore it. However, there were other players who wore that number before him, and probably other players on other teams that wore the #99 at the same time that he wore it for his team.
Several notable players have worn number 27 in the NHL, including Hall of Famers like Mike Gartner and Glen Murray. Other prominent players include Sergei Gonchar, Chris Kunitz, and current stars like Charlie McAvoy. The number has been associated with a mix of offensive talent and strong defensive play throughout its history in the league.
Ron Francis wore number 10 during his career in the NHL.
Guy Lafleur from the Montreal Canadiens
Yes.
Zach Parise
Nobody
There are 3 players from each team in a NHL shootout