Interesting. While I'm not (yet) fully on board in agreeing with you, one compelling argument that might lean in your favor is that in the All-Time OPS rankings Ty Cobb ranks only 25th. Most experts opinions whether based on anecdotal evidence or not would say that Cobb was a much better hitter than merely the 25th best in history, and certainly a better hitter than the likes of Jim Thome & Frank Thomas who are ahead of him on the All-Time OPS rankings Cobb is 9th All-Time in OBP Right, but in that case OPS+ would be a far better indicator in comparing players in their own era's. Cobb ranks 10th all time there, and an argument can be made that almost every hitter above him was a better hitter. Ruth, Bonds, Williams, Mantle, Pujols, Gehrig, Honrsby, Shoeless Joe, and then Dan Brouthers who was done by 1896. But if you're comparing two guys who are playing at the same time, and who are both power hitters, not sure what stat you're going to find, what single stat will be a better indicator. Frank Thomas, while not Ty Cobb WAS an incredible hitter though...