432 Park Avenue
Steinway Tower
Central Park Tower
30 Hudson Yards
One Vanderbilt
Only one of these are actually built, so can we really bestow a title like "King" before they actually mark their completed presence on the skyline? 432 Park is about the least distinctive supertall imaginable... ostensibly appearing as nothing more than a taller, skinnier verison of the Shell and Republic towers in New Orleans and Houston and Denver:
And aside from impressive height, I don't find any of the new designs to be too special. Steinway renderings certainly look dramatic, but its slenderness just won't have as much of an impact on the skyline as a more stout (and tall) building would have. Also, given all the competing tall, skinny trees now along CPS/57th, it will get lost in the forest in that location.
That's also a big reason why the ESB is such a standout... it serves as a central anchor of Manhattan in a way that none other can.