OTM had a post today about how the most likely "high profile" FA signing would be Ozuna because he'd command a shorter contract at cheaper dollars.
Overall, I think the Sox will simply attack the margins much harder than we like to dream about when thinking of free agent acquisitions — this is a slow build, after all, timed both to mesh with returning starting pitchers this season (Chris Sale, Eduardo Rodríguez) and younger players and minor leaguers/draft picks going forward (Tanner Houck, Bobby Dalbec, Tristan Casas, Jeter Downs, among others). My general rule of thumb in free agent watching is that if a player will define the Sox for five years or more, he’s probably the wrong guy. Bloom bought time with his thrifty 2020, and I expect him to use it.