I didn't get to see Larry much as a kid (no cable), but what I did see I saw him as a great heel, but he never quite reached that "Main Event" status consistenly and with good reason. He was a good mid carder nothing more. Beat up on some good guys, have an occasional main even fued even help out another main eventer i.e. helping Henning with the AWA title, but just never was a consistent main event caliber wrestler to me.
Face it a lot of guys never got their due with a world title run especially in the 80s while "Hulkamania" was running wild. I don't know if you can include Andre in that he was so big he didn't the world title to be a huge attraction. Yeah it would have been nice to see him get his due with the belt but it didn't diminish his career.
Some I would include in that list mainly never got a title run because of "Hulkamania" and the fact that with a few exception Vince has wanted his champions to be "larger than life." Charisma first, Muscles second, in ring ability third. That's why guys like Ricky Steamboat, Tito Santanna, Greg Valentine and the like never wore the gold. Others like Big John Studd were shut out because of his fued with Andre and the fact it was all about Hogan and a heel world champion would just not have worked then.
Zybysko is just part of a huge list of guys who won't be remembered like they should he's not any more special than half of them.