The Tees is already referenced indirectly in the name of the stadium. How about the Doggy Market stand? I like the idea of landmark, though.
The problem with naming stands after players is that people immediately look to periods where we have little to no living memory of having seen these people play for us, with the exception of Maddren and Hickton, etc. People probably think of Hardwick, Mannion, Clough, etc. I imagine there'd be clamour for a Juninho stand, but what about Tony Mowbray (Sunderland manager and people were negative about his period in charge as manager), Southgate (won our only major trophy as Captain, but relegated with us and people were divided on his signings for us), Bryan Robson (the fans booed him on the pitch in his final appearance but he oversaw one of the most exciting periods in our history), Slaven (he was banned from the Riverside for a while, I think). People will come up for a reason why a certain person shouldn't be in the mix for every reason that they should. Even Captain Cook is a reminder of the colonial past. And all of the aforementioned players (amd those who already have some sort of dedication to them at the Riverside) are white when we've had so many important players in our history who are black, like Lindy Delapenha. The 'Three Degrees' statue at West Bromwich is a very signiicant new landmark for their part of the West Midlands, for example.