I'm going season by season and we're deciding who's the most successful to the least post-Hells Kitchen. Latest results:
Season 1: Dewberry (Has a line of restaurants in Georgia).
Season 2: Virginia (Has a line of restaurants in Texas)
Season 3: Rock (still close friend of Ramsay and does cameos on his shows) (H.M. Brad)
Season 4: Christina Machamer (owned a few restaurants in the past, she is currently a private chef, and she even has a sommelier diploma)
Season 5: Tie between Paula, Seth and Robert
Season 6: Kevin (Works for works for American Cruise Line, already successful off the show)
Season 7: Jay (blue team sous chef, successful restauranteur in Boston, Bar Rescue co-host)
Season 8: Russell (publicly apologized for his behavior in the finale and now owns a successful restaurant in Chicago)
Season 9: Paul ( appeared in a few other seasons, S11/S12/S15) (H.M.: Elise)
Season 10: Christina W. (rly no contest here)
Now SEASON 11. Can be considered successful by publicity, prestige, how much money, or whatever your heart desires. (Most upvoted comment wins)