The Bandybucks, Tools, and Baggins are well established family lines in the Shire - some like the Tooks are thought to be some of the original Hobbit lines - and both Pippen and Merry have known a life of privilege and comfort prior to the story. Frodo does as well, but mostly because he’s the named heir of Bilbo. So as far as Hobbit society has any sense of gentry, all the hobbits but Sam would count.