Brett Farve might be the 4th or 5th best ever....maybe. I'm not sure, but he's definitely not the best and I wouldn't trade him for a young up-and-comer, at his age, even if he was the very best ever. The guy's almost ready to retire.
He's got a lot of heart and his "want-to" might be the best ever, but the media has about 20 different QBs that they will call the best ever at any given time. I'll tell you what presently playing QB MIGHT actually be the best ever: