WWhad a lot of creativity through its visual design, and made a nice step forward for 3D Zelda combat, but it was rather lacking in the dungeon design. The Triforce Quest was a disaster of an idea, too. It's still a very enjoyable game, though, with one of the better stories in the series. TWW and TP are close -- both flawed, but not entirely bankrupt -- but between the two, TP definitely suffers a bit more from feeling derivative.
Edit -- Also, SS is better than both, from what I've played, I would agree, but I wouldn't call it a more 'flawed' or 'unpolished.' There are some nagging issues, and some things could have been improved, but the entire package is better than any Zelda since OoT. Really great game.
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"When I was a young man, I had liberty, but I did not see it. I had time, but I did not know it."