The Red Sox probably disagree with you and think they have two very good ace candidates in house already in Houck and Bello.
They will need one starter plus depth for next year. And they have both infield and outfield crunches. But if you want a top tier starting pitcher, expect to have to deal from the set of Mayer, Duran, Casas and/or Anthony. Packages headlined by Wilyer Abreu won’t cut it. And no you can’t add in additional players to make it work, unless one of those players is Mayer, Duran, Casas, and/or Anthony. But expect one starter and hopefully some depth.
Next year’s bullpen already has Hendriks, Fulmer, Whitlock (please, please, please leave him here), Kelly, Winckowski, and Slaten penciled in. A lefty or two and some depth.