Alexander Litvinenko Although I'm not sure about the title and the way this thread has developed. Some of the people mentioned so far aren't "nice guys" - they're utter cunts who just happen to give a part of their massive wealth away to charity.
A "nice guy" has to be genuinely and consistently "nice" - not just loaded and aware of how much good publicity they'll get from giving money away.
Fair point.
I'd add Xavi to this list who always comes across well in interviews. I liked his reaction to Barca's defeat at Celtic last year, when rather than feel sorry for himself, used the interview to praise the atmosphere created by the crowd. I also like the fact that Matt Le Tissier is his favourite player.