Back in 2002 when TNA first started it was the Jarrett's that founded the company and Panda Energy was just an investor for the company. During the first few years of the company Jeff was not only the top heel but also just the leader of the company holding the World title on six occasions. Jeff actually never held the title when it was under just the TNA banner as he was really out of the ring by then and just held the NWA version of TNA's World Title.
Though his legacy with the company has had it's ups and downs without the Jarrett's and Jeff in particular it would hard to predict where this company might be today. With that being said very few people would be more deserving to be in the Hall of Fame for this company other than the man who founded it with his father.