You've missed the point. The importance of Yaz and 1967 was beyond statistics and pennants. Maybe you weren't alive to experience Boston baseball in the early 60's. The importance was that he was the centerpiece of a franchise saving team that revived and saved the franchise. Don't take my word for it. Read Bob Ryan's writings about it. He has always said that in Boston Baseball 1967 was the clear delineation. Many other long time writers have placed the same importance on that year, including Gammons. Baseball in Boston was reborn that year. That's why it was so important. Also, it wasn't a 1 year wonder. While nothing could match 1967, they put out winning teams (16 straight seasons) and many strongly competitive teams including 2 World Series teams.
It may be argued that some Sox players were greater players than Yaz (not too many were), but IMO, none had more of a positive impact on the franchise. If you didn't see or experience Boston baseball prior to 1967 and witness the change, you are speaking from a position of ignorance.