It's close but I gotta go with Dale Murphy. Back to back MVP awards and perhaps the nicest guy ever to play the game.
Quote
"A ballplayer has to just go out and be mean. You can't play half-heartedly. If you do, there's someone right over your shoulder that'll take your job away. If you don't do your job, what they're paying you for, why should they pay you? You just can't put in eight hours, that's what a lot of people don't realize about athletes. Very few people realize the pressure." Dave Kingman