You know what's more than a little badass? Going out and doing your job when you're getting death threats for doing your job (especially when you do your job in front of tens of thousands of people in the days before metal detectors at stadiums). Hank Aaron had a badass baseball career (he retired with the most home runs and second-most hits in history), but it's his bravery in the face of the threats he faced as he secured the home run throne that lands him in the badass hall of fame.
21. Hank Aaron