I would start with the 50 home run hitters first...
I know Arod had some 50 home run years, but I don't remember if he ever stole that many bases during his Seattle days, and by the time he got to Texas/NY he slowed down.
Bonds is the other obvious choice, he was a big base stealer during his Pirate days, and of course he had some big power years, so without looking I'd say Bonds?
Sosa had a couple of 30/30 seasons but i don't think he got anywhere near stealing 50 during his power years...
Canseco had a 40/40 season...
Tim Raines ain't never have no 50 home run season
Guessing I would say its Ty Cobb or some player from the 1800s or some sh*t