Charlie Day, Rob McElhenney, Glenn Howerton
The "It's Always Sunny..." Characters Are DevolvingDennis, Mac & Charlie started out as just plain ol' creepy, but have blossomed into full-on sociopaths.
Watch Charlie Day Yank Off Danny DeVito's UndiesCONAN Highlight: The only way Danny would wear tighty-whities is if Charlie slipped them on him personally.