The most overrated is The Wind Waker. It is first and foremost a poorly animated cartoon that assumes Link died in OoT. . . just no. The sailing takes an eternity. The Zora are now freaky bird people. Ganondorf looks like he has a massive bear belly. It's a poorly animated cartoon. The boss battles seemed a bit easy. The ending makes no sense. Its also A FREAKY UGLY CARTOON!\
The most underrated is TP. People seem to hate that game. It was similar to Ocarina of Time in look, geography, and feel. We all agree OoT is awesome, so there should be a connection. The wolf was interesting idea, I liked it. The boss battles were among the best and most action-packed in the series. The story was nice and serious. I got to ride a horse again. It was just an awesome game. Stop hating on it!
While I do agree with your analysis of Twilight Princess being underrated I feel you were very harsh on Wind Waker!
First fo all the Wind Waker takes place on the Adult timeline so it has nothing to do with Link being defeated as that is where AlttP happens on the Defeated timeline! Also by quoting that the Graphics are cartoony is a poor assessment in my eyes! The style is called Cel-Shaded it isn't meant to be an animated cartoon by any means...Plus the Cel-Shaded graphcis added to the charm of the Wind Waker and by saying that it had "poor animation" when TWW really brought facial eexpressions to life is a bit of an understatement in my eyes!