For me, Pele was the best. Agree with Lfsea, if you want some history and insight into the South American game, listen to the World Football Phone In, one of the best football podcasts going. Tim Vickery is my personal favourite football broadcaster working today, he's a student of the game and always offers an intruiging opinion.
For example, when someone says, Pele wasn't as good as Garrincha, and the people of Brazil hold Garrincha in higher regard, Vickery says it's a load of nonsense, which is absoloutely right.