Taffy Abel,
First man from USA to play regularly.
Played only with two teams, the New York rangers and the Chicago Blackhawks and won a cup for both.
Won a silver medal in 1924
Member of the US Hall of Fame
First cup for the rangers when he played and first cup for the Blackhawks when he played with them.
- mattyg2005
Note about Harry Watson at the 1924 Olympics:
At the Olympics, Watson scored 36 goals in five games as the Canadian team outscored the opposition 132-3 over six games. In one game against Switzerland, Watson scored 13 goals.
I get that it was more or less Canada and then a bunch of C-level teams at that time, but this still doesn't seem possible.