There is a middle ground opinion here...
Zach Thomas was a Dolphin great... overperformed and put up nice numbers. He is, in my eyes, a fringe player. He was very good, but I didn't consider him great. I think that entire defense was overrated - partially due to complete lack of help from the offensive side - but partially cause they just choked a lot. Consistently choked in crucial moments it felt like. If they were as elite as it seemed, they would have CONSISTENTLY carried our offense.
There was a season we sent something like 6 or 7 defensive players to the probowl... another year of choking.
He was a good player who was consistent for the most part, but I would be okay with ZT not being in the HOF. Just my opinion.