#4 Sheamus vs Tomohiro Ishii
Let's move from a match where technical skill would be at a high level to one where two guys could just beat the stuffing out of each other. Sheamus is highly regarded as a wrestler known for being stiff in the ring. On the other hand, when you're talking about who hits hardest in New Japan Tomohiro Ishii has to be on the top of your list.
Just imagine the sickening sounds of flesh on flesh as these two brutes beat each other senseless. The chops would be nothing compared to the headbutts and every manoeuvre would be a power move.
No matter who wins this encounter, both Sheamus and Ishii would leave a little piece of themselves in the ring. The blood could be flowing and considerations of concussions would be out the window during this encounter. It would certainly be a violent affair, to say the least.