Anybody with half a brain knows it is The Babe. Not even CLOSE. You want to talk about how he would do in today's game? The simple fact is, he was hitting monsterous home runs when nobody else was hitting them AT ALL. If you've been to the Stadium you know how far the wall was originally because its still there.
In 1927, Ruth's 60 home runs accounted for 14% of all home runs in the American League that year. To put that figure in modern perspective, a player would need to hit over 340 home runs in a season to account for 14% of the American League's total homerun output.
After the Red Sox sold him to the Yankees, Ruth single-handedly outhomered the entire Boston team in 10 of the next 12 seasons.
Oh, by the way, he was also 94 and 46 with a 2.28 career ERA, when he was used as a pitcher.
The Babe would piss on Bonds if he were alive today, then he'd fire up a good cigar, lace his cleats up, and go win another ballgame.