I think Draymond Green will be a hall of Famer but not 1st ballot. The big thing he has going for him is he has actual accolades to go along with his mediocre counting stats. He is a 3 time all star, 5 time all defensive team member, 2 time all NBA member, and 3 time champion. When Curry and Thompson come back (barring injuries) I can see him adding more all defensive team and maybe even championship's to his resume.
It's no doubt he is a role player and he definitely needs good players (this season for sure is really showing it) around him to help win games but if it is good players around him, he is a great player to have on your roster.
I also think Ben Wallace should be in the hall of fame for what it's worth.....