What about easily the best player since Maradona? that one came around quite often pre Messi.
Look how underrated Rivaldo is compared to Zidane, he was even better than him at wc's and they are more or less at the same level, yet you put a poll up it will be Zidane winning it 90-10% type which makes him overrated.
I think you may be placing your opinion a bit high and above everyone else's here, I for one think that Zidane had an incredible career with his nation and I'm not talking about the double final headers only but many more events, for one I find Zidane vs Brazil in 2006 world cup to be one of the best midfield performances I have ever seen in a world cup (and one of the best ever), I invite you to go down the memory lane and watch one of the 7 min(ish) long videos of that on youtube.
Rivaldo was great no doubt and had a more vital role than Zidane up front, but as a mid fielder, dictating the flow, controlling the rhythm, making certain passes nearly always and making intelligent changes or long passes as well as keeping the ball and dribbling... think again in my opinion Zidane wins all those while Rivaldo wins most of the needed tools to score like shot technique, shot accuracy.
Definitely not an overrated player for me.