I was surprised that I couldn't find a single Rangers' team with 10 +30 goal scorers on it at one time (in the '80s).
I'm cheating here, because it's not a decade, rather 11 years (anything with an "8" in it as far as years go I'm using), but here's are all of the scorers who scored +30 goals, only prior to playing with the Rangers, or with that player still being on the roster the following year. I'm not counting the Turcotte, Dave Gagner, Paul Fenton, etc, because they did it on other teams after being with the Rangers, or in Turcotte's case, the year after he scored 30 goals, he's into the '90 (1990-91).
Has a team, ever had more 30 goal scorers in a single decade (or 11 years)?
1979-80 through to 1989-90
Phil Esposito - 76
Bernie Nicholls - 70
Guy Lafleur - 60
Marcel Dionne - 59
Blaine Stoughton - 56
John Ogrodnick - 55
Pierre Larouche - 53
Bobby Carpenter - 53
Mike Gartner - 50
Mike Rogers - 44
Steve Vickers - 41
Tomas Sandstrom - 40
Ron Duguay - 40
Pat Hickey - 40
Walt Poddubny - 40
Vaclav Nedomansky - 38
Mark Pavelich - 37
Tony McKegney - 37
Tony Granato 36
Bob Crawford - 36
Lucien DeBlois - 34
Anders Hedberg - 33
Carey Wilson - 32
Don Murdoch - 32
Brian Mullen - 32
Brian MacLellan - 31
Eddie Johnstone - 30 (twice)
20-goal scorers
Don Maloney - 29 (twice)
Doug Sulliman - 29
Ulf Dahlen - 29
Walt Tkaczuk - 27 (twice)
Ulf Nilsson - 27
Mark Osborne - 26
Mike Allison - 26
Kelly Kisio - 26
Larry Patey - 25
Doug Wickenheiser - 25
Robbie Ftorek - 24
Bob Brooke - 24
Jere Gillis - 23
Mike Blaisdell - 23
Mike Ridley - 22 (he scored 31 in 1986-87 split between the Rangers and the Capitols)
Dean Talafous - 22
Warren Miller - 22
Rob McClanahan - 22
Peter Sundstrom - 22
Paul Cyr - 22
Chris Nilan - 21
Brian Lawton - 21
Lane Lambert - 20
Lindy Ruff - 20
Defenseman
Reijo Ruotsalainen - 28
Ron Greschner - 27
Walt Tkaczuk - 27 (twice)
Carol Vadnais - 24
Brian Leetch - 23
Barry Beck - 22
Mike McEwen - 20