I never really got the fuss about Zbyszko, maybe his name held him back, but for such a living legend he won suprisingly few big titles. (Note to fanboys, I know why he is called that, please don't correct me)
Jericho is slightly bigger than him, but he is also faster, and more capable of using all six sides of a TNA ring to his benefit. It'd probably be a bit of a back and forth matchup, but I think Jericho would end up winning it quite decisively.