What's the budget? the latest Cervelo S5 has integrated bars that you can add aerobars too? I think possibly the Trek Madone can do this too? and there are ITU bars available for the Venge. If these had Etap or Di2 then additional controls aren't all that tricky.
https://www.trainerroad.com/...sions-how-good/18189
https://www.trainerroad.com/...sions-how-good/18189