#4 Batista

It could be argued either way and even Batista in his interviews when talking about why he left WWE has said that he wanted to play the bad guy. But then on the other side of the coin, the biggest success of Batista's career came when he was a babyface and challenged Triple H for the title after winning the Royal Rumble.
He was able to go on a successful run as a champion in a campaign that lead him to defend his title on multiple occasions. During the same stint, Batista was involved in a great feud with The Undertaker where both of the contenders picked up wins against each other at different junctions.
Even though Batista was able to have multiple stints as a champion his very first stint as a babyface still stands out as that was the time when he was the most over among the crowd.