It appears that Bagwell and ARod were/are the exact same hitter:
Check out some other interesting comps after the break (All data from Rally's WAR database).
Here's a few other spot-on comps:
(Chipper, that is.)
Now for some defense. In his 9 best seasons, Griffey Jr. saved as many runs as Dunn has given up during his career (Defensive runs is the sum of TotalZone + OF arm + Position adjustment):
Finally, Rickey Henderson gained as many runs with his base-running as Harmon Killebrew forfeited with his glove: