Eddie Romero
Romero is another internal option for the Red Sox and he does have his merits. His extensive background in international scouting could be very helpful as Boston looks to navigate the international free agent market and make deals with Latin American players. Romero also has been an assistant GM since 2018, so he knows the organization well top to bottom. However, Boston probably needs a new direction and Romero doesn't really seem to have the gravitas to do much other than what ownership tells him to do.
Sam Fuld
We now enter the "grew up a Red Sox fan" portion of the speculation with Sam Fuld. These sorts of connections always seem lazy, but at least Fuld has a background as a front office executive in a big market in Philadelphia. However, his partnership with Dave Dombrowski with the Phillies seems to be working well enough and he doesn't really have much experience running a front office with Dombrowski calling the shots in Philadelphia. Boston should pass here as well.
Carter Hawkins
Cubs' general manager Carter Hawkins is at least mildly interesting as he has done a reasonable job in Chicago of steering the franchise in a positive direction. Top level decision-making experience is a problem here, though, as Jed Hoyer is really the one calling the shots with the Cubs. Certainly not the worst option Boston could consider, but they should be able to do better.
Chris Antonetti
Every time a front office job in a big market opens up, the Guardians president Chris Antonetti's name comes up. A lot of people seem to be fascinated by the idea of Antonetti, who seems to always put a decent team together each season despite having next to no resources, having a real payroll to work with. However, Antonetti seems to be happy in Cleveland and has a track record of turning down opportunities to stay there. Boston will probably ask to talk to him, but will probably get turned down.