I'd take the Ping An Finance Center from Shenzhen and put it where Salesforce Tower is in Chicago. It's a beautifully modern building with that relies on structural expressionism akin to the Hancock.
would replace this, which is albeit a nice building but doesn't make the statement the site (the confluence of the Chicago River) demands:
I think it'd help add another big peak and help even out our skyline from many angles. Salesforce Tower is almost halfway between Trump and Sears Towers: