I can think of a lot of great role players but I can't think of ones that hold as many rings as he does and actually earned all the ones he has.
'koast brings up a great issue. Does being the paragon of role player, the text book definition of a role player, the most successful role player (not being a Celtic in the 60s) in the history basketball, make Horry worthy of induction as a testament to all the players that do all the little things (and some big things) to achieve the biggest accomplishment in an NBA season.
Basically what I'm saying is that I don't think the induction of Robert Horry will open the floodgates to the Bowen's, Kerr's, Harper's, and Microwave's of the world because no role player will ever, EVER have that type of success, with than many different teams, with that many memorable game-altering/game-winning performances.
If the Hall of Fame is supposed to hearken back and capture individuals that defined era's or contributed greatly to the game of basketball, wouldn't there be a piece missing if Horry is forgotten?
All of it is probably moot because the unselfish nature required to fulfill a role rather than absorb the spotlight usually goes hand in hand with not caring about accolades or ceremonies. I'm sure Horry's astounding and consistent success is his own greatest reward.