The 74-75 Pittsburgh Penguins had 10 over 50. Unbelievable
Schock
Apps
Pronovost
Hadfield
Larouche
Kehoe
MacDonald
Stackhouse
Arnason
J-Bob Kelly
Montreal had 9 over 60pt and Buffalo had 9 with 50 points in 74-75
Montreal in 1975 with 9 guys over 60 points has got to be the record for most 60 point guys I would guess. 1990 Flames had 8 guys who had over 60 points, 9 over 50. I think the Flames were more balanced and probably more battle tested than the 1989 team and yet they lost despite all of their scoring balance. It started a really bad trend too for them.
By the way, I'd have gone to my grave before I'd have ever thought the 1992 Caps have (seemingly) the record for most guys with 50 points with 11. Even after that you had guys under 50 points, Todd Krygier, Sylvain Cote, John Druce. They still had an old Langway on that team.
I even thought the 1978 Cherry Bruins with that record of 11 guys with at least 20 goals would be up there with such a balanced attack but even they only got 10 guys with 50 points, not 11 like the 1992 Caps. The following year in 1993 they still had 9 guys with 50. But they finished 10th in goals for. That is just some serious balance without that true gamebreaker to help them get over the top.
1975 Sabres with 9 guys who had 50 points and 8 guys who had at least 60. Still no one beating the 1975 Habs with the 9 guys with 60 points.