My favorite album of all time is Going For The One, and there really isn't a bad track on there (though Parallels is my least favorite). Hemispheres, perfect. Images and Words, perfect. Sabbath Bloody Sabbath, perfect. Asia, perfect.
Hmm... Powerslave, maybe Flash of the Blade or The Duellists (neither song is as strong as everything else on the record). Wind and Wuthering, Your Own Special Way. I used to put Clutching at Straws here (Sugar Mice) but since the live "Surrounded" from Chaos in Motion, that song has new life, so it belongs in the "perfect" list.