Zeke and Wade won NBA titles as the best player on a title winning side. Cousy did not.
Cousy was league MVP, how was he not the best player?
I was pointing out Cousy as I felt he should be in the conversation. I get that this list and the discussion in general tends to be more towards who would be best in the modern game where the perception is that all the players are in general better athletes than the players back in Cousy's era. I feel Cousy is right there with Nash or Stockton for sure, and even should be in the discussion with Thomas and Wade.
Overall, my tiers would be:
Jordan
Magic
West
Oscar
Curry
Kobe
They you get into all the rest, Thomas, Wade, Nash, Stockton, and yes Cousy, and maybe some others I am not thinking of. There are a lot of players that could be considered for this tier.
I don't know where to put SGA at this point. His current trajectory would have him in the second tier before he is done, if not already. Two MVPs already, likely multiple titles. I am not sure that he gets to the Jordan/Magic territory, but he might.