No, he is not a Hall-of-Famer. He’s a good returner. But he is not Hall of Fame material. Just my two cents.
He is a very good returner and he's had more success at it than almost all others before him.
BUT
The reason his numbers stand out so much compared to others is that he's been returning kicks for a long time. The reason for that is that most other returners do so in addition to their primary jobs and typically early in their career. The reason Hester has been returning kicks for his whole career is his high level of suckdom at other positions. If he would have had receiving talent, he would have ended up off special teams. Since he sucked at all other aspects of the game he remained a return guy long past the point where talented players move on.