The Phillies will likely be active this offseason, just like they always are. There were some initial rumblings about Nick Castellanos - who is owed $60 million over the next three seasons - being available, though that has recently been walked back by the team to some extent. That could all be a bit of misdirection, so it's worth inquiring; Castellanos would be the perfect veteran bat for the Guardians lineup.
San Diego Padres
Juan Soto is 100% going to be traded this offseason; at this point, it's the worst-kept secret in baseball. Why not the Guardians, right? But beyond Soto, it seems like the Padres are in the beginning stages of a true tailspin, so it's likely plenty of the roster could be available in trade talks, and Cleveland has had plenty of trade success with San Diego before.