Good lists. Not so sure of 123, his wrestling was great, but he wasn't a good promo( which Benoit wasn't either to be fair, but his intensity gave him presence and added a sincerity and weight to what he was saying and made it effective).
He's always been great in the ring. And like I said, as a kid I just enjoyed his ring style, I wasn't watching WCW back then, so I enjoyed the kicks and flippy shit. His mannerisms were always funny to me. He's on there purely for nostalgia and the fact that later on in life, I actually learned he was pretty competent in the ring.
I definitely expect my all time list to alter and shift around a lot. But Jericho and 123 are permanent residents for sure, just because of their impact in terms of keeping Kid Lake entertained long enough to get to the even better stuff.
That said, I can see guys like Owens for example, making the list and taking Benoit's spot-- Because like you said, Benoit was a terrible promo, but the story he told in the ring was amazing. So logically a guy like Owens who can tell a story both in and outside the ring can naturally take that spot. Just needs more time and for his career to wrap up before he's an ALL TIME GUY.