I see no future where the tallest building will be built in Columbus (or Cincinnati). Columbus' best chance was when Bank One built the 2,000,000ft²
McCoy Center in the suburbs. It could have been Columbus' Key Tower just five years later. I will say that I'm not sure Chase still has ~20,000 employees in Columbus if Bank One had built a tower downtown instead. Much easier to off load space in a tower than a campus.