There are different levels in the HOF so saying such and such is in the hall of fame or on the cusp doesn't necessarily represent a true bar. I think Fox has serious potential and while I'm not sure he'll be as prolific as someone like Gary Payton I think he can do some of the same things defensively if he develops. Buddy could potentially reach a Reggie Miller level. Players like T-Mac, Vince Carter (he'll get in IMO), Mutomobo, Ray Allen all represent different levels and types of players. Some mostly stats guys. So, if the production ability is there and you combine winning it's possible to be in the conversation. Going back to the initial premise, they need to put their most capable players in a position to succeed as individuals in order to identify where they are on some sort of scale. Playing role players over your real talent at this point and losing anyway is shooting for a far lower tier than they should.
Role has everything to do with opportunity when related to individual accolades like HOF. For instance, Isaiah Thomas in Boston, had he stayed there his whole career putting up 25 ppg do you think he's in the convo for HOF? So far in his career no other team he's been on has given him that same chance. That will ultimately define where he ends up once his career is over.