1939 - Winnipeg won the Grey Cup by a score of 8-7. Winnipeg has 3 singles while Ottawa had one. Remove the single point and Ottawa wins 6-5. Of course strategy may have changed a little as well. In the last minute of the game, Winnipeg chose to have Art Stevenson punt for the winning single from the 23 yard line and Orville Burke kicked the ball out of the end zone. On the next play, Stevenson punted again, this time from the Ottawa 8 yard line - game winning single. If the single was not an option, it seems likely that Winnipeg would have moved the ball to the center of the field to attempt a game winning field goal.
You also can't focus on 1 point games either.
1962 - West Final - Winnipeg & Calgary are tied at 1 win apiece. Last play Gerry James attempts a FG to win the game, a single sends the game to overtime. James missed the FG. With the ball bouncing on the ground, Calgary's Harvey Wylie tried to kick the ball out of the end zone. He misfired on the kick and Winnipeg's Farrell Funston recovered for the game winning TD. Winnipeg won 12-7 and would go on to win the Grey Cup the following week.
1974 - Toronto was leading Winnipeg 13-12 on the final play of the game. Walt McKee kicked the ball into the end zone. Toronto's Peter Muller tried to kick the ball out of the endzone but it was blocked by Paul Williams - Jim Heighton recovered for the TD. Winnipeg won 18-13