1. Powerslave - Not only ancient Egypt gave them a theme for the title track, but also arguably their best cover and stage set ever.
2. Live After Death - So Eddie dies and comes back to life (life after death) in a gatefold sleeve accompanying the lavish package of a fantastic live album.
3. Seventh Son of a Seventh Son - Surreal, perfectly suited to a concept album.
4. The Number of the Beast - Amazing idea. Who is pulling the strings? Eddie or the Devil? Eddie! No, the devil! Wait for it, Eddie! No, the devil!
5. A Matter of Life and Death - Dark and brooding cover, just like the material focused mostly on war.
For the most part, we have been really lucky to have great artwork with Maiden, even without Derek Riggs involved (Fear of the Dark, The Wicker Man, and The Book of Souls come to mind as excellent examples of this).