You and I are one of the few who go back to the 70's and actually watched these guys play unlike most of the young turks in here who probalby represent 80-90 % of the board in here, but a few others that I can think of who were longtime career Rangers besides the ones you astutely brought up were Steve Vickers who just so happens to be my favorite Ranger of all-time. What a great player he was for us that most peeps in here don't even know about. I'll never forget the time he challenged Dave Schultz to a fight and Schultz declined knowing Vickers reputation as a great fighter besides his prowess as a player.
A few other career Rangers from back in the day I can recall were Rod Gilbert and Anders Hedberg who haven't been mentioned.
Players on the current roster who if I had a gun to my head and had to choose who I feel pretty confident and have best chances too finish and retire as career Rangers would be the aforementioned Hank for sure and I'd add McDonagh and Kreider to the mix.
Other than those two besides Hanky, I can't really see anyone else I'd feel Gorton wouldn't deal away in the right deal if it would help our club. Now obviously like what occurred with Leetch who is as close to a career Ranger as you can get withought officially being one, one never knows what will happen going forward with the current system that is in place in the NHL. But one would have to think it would take an arm and a leg for Gorton to ever let McDonagh and Kreider go.
It's an interesting question to ponder and an excellent thread brought up by the OP....well done....