John Ross, to me, was the whole reason for the first few seasons. It all came down to "Baby John". All of JR and Sue Ellen fights, the controversy between Cliff, JR, Sue Elle, Digger, Jock... It was all about John Ross.
I always loved the little guys who played him. I thought Omri Katz did a great job when he took over as adolescent John Ross through the movies.
Now on the reboot, to me John Ross is the focal point of the show as well. For me, John Henderson's portrayal is far and away the best out of all the newbies. He brings all the layers John Ross should have and we can certainly see him becoming his daddy's son.