I think you should be trying something around 58cm-ish ETT with hideously large saddle-to-bar drop, like about 17cm. The taller you are the more imperative it is to fine-tune a good horizontal aero position. High head tubes on vintage bicycles, or the new fad of adventure-style bikes with bars level to the saddle will prevent tall people from achieving a comfortable position. When you see a bike like this you might initially think, wow there's no possibility that could be comfortable, but you would be wrong. Tall people need this. Try it and see. This isn't my bike but I'm guessing the rider is about 6'4" or 6'5".
