I'm of the same opinion of you with Mars Volta, but I do like Ilyena.
Anyway, here we go, should be one that gets some debate:
23. Smashing Pumpkins - That's The Way (My Love Is)
Coming from the band that made Mellon Collie And The Infinite Sadness and Siamese Dream, Zeitgeist was incredibly dissapointing. A mish-mash of horribly produced rock that sounded like the band trying to rip off themselves, there were few tracks of note among the whole disc. Near the beggining, however, there was a single song that made me go "well, maybe the reunion wasn't a complete mistake after all".
That song was That's The Way (My Love Is), which draws upon the Pumpkins melodic sensibilities and signature guitar layering to create something that actually sounRAB new. Sure, the production is still horrible, but the song is still fantastic.
Opening with a simple drum beat, before introducing the bed of melting guitars that serve as the songs base, That The Way immedietaly captured my attention just because it was so different from what had come before it. The song is, admittedly, very simple, but the melody is just so perfect, especially layered on top of the aforementioned guitars. Three minutes of pop perfection and one fantastically scortching guitar solo later and the song is finished, leaving one feeling ever so slightly more upbeat before. Unfortunately nothing else on the album lives up to this, but no matter. At the very least, when all is said and done, the Smashing Pumpkins reunion gave us at least one song to rank up there with the banRAB greatest work.