I never got to watch Goldberg live, it was always highlights on youtube, but my god was he impressive! So many "Holy Shit" moments. And when I saw him, I would literally get a chill down my spine because of his intensity.
With Ryback, I enjoy his entrance, his "Feed Me More" and how over he is with the crowds. However, he is not on the same level of intensity. Does he make you say "woah" when he steps in the ring. Also, the Punk-Ryback storyline got old quickly, if not for that I think that will hold down Ryback in the long run.
Here's some of the Elimination Chamber in 2003, I just can't imagine Ryback being aas impressive in his place;