With his career having come to such an abrupt and unfortunate end, Shibata is one of the few modern day workers who we can really properly evaluate today. I think he was largely great and among the best in the world from when he returned to NJPW up to his injury. The Okada match in particular is one of the greatest performances I've seen. From the little bit I've seen of his earlier career, he was great as the young punk who tried to big league guys like Jun, Fujita, Kawada, and Tenryu only for him to get demolished. And while those who dislike Ishii may have similar issues with Shibata, the latter would still work submission and do a bit more grappling (not to suggest Ishii is one-dimensional, I think that's a misconception).
It's likely Shibata finds a place at least in the bottom-half of my ballot.