I'd have to say Minnie Minoso. Like many of the other Negro League players much of his career was lost to time. He was a spectacular Outfielder who played in in the MLB when he was 50, on a comeback tour.
Batting average: .298
Home runs: 186
Runs batted in: 1,023
On base percent: .389
Slugging percent: .459
9X All Star w/ 3 Gold Gloves
And to top it off he played in 5 different decades of baseball 40, 50, 60, 70, 80's.
I would say he has to be given serious consideration.