pfft! Only the 80s stuff. Sad Wings of Destiny has one track that I don't care for (Epitaph... I'm sorry, but this is just *silly*), and Stained Class has absolutely no filler. Easily the two best studio albums JP ever did, IMO.
Sin after Sin does suffer a bit, though. I think that JP was just trying to be too progressive. The cover of Diamonds and Rust kinda sounds disco-ish or something (far better and more m3t4L live as heard on Unleashed in the East). Last Rose of Summer, while my second favorite track on the album, has absolutely no place on the record. I'm not exactly sure what Here Come the Tears is trying to accomplish, either. Other than those three tracks, though, it was a solid album!
After Stained Class, JP just kinda fell apart and became more interested in being a commercial band. From Killing Machine on, the band's catalogue would just have lots of filler on every album, along with tracks that just don't appeal to metalheads!