1. Seventh Son of a Seventh Son
2. Piece of Mind
3. Somewhere in Time
4. The Number of the Beast
5. Powerslave
6. Iron Maiden
7. Killers
SSOASS is pristine and PoM has so many very high points that QFF doesn't matter much. SiT has a few songs that I don't like as well, but nothing outright bad, and the highs are really high. TNotB is consistent (Gangland aside) but not at as high a level as the top three. Tracks 3-5 on Powerslave just really drag that album down for me, but the obvious four are great. I might rank the album higher as a whole in a world where Live After Death didn't exist, but because it does, I almost never listen to the Powerslave album.
I'm not much one for the Di'Anno era. It's good music, but it's not what draws me to Iron Maiden. Those two albums default to third and fourth to last place overall, with NPFTD and FotD in the last two spots. I put the debut above Killers because Phantom of the Opera and Remember Tomorrow are far and away the best songs of the Di'Anno era, to the extent that I would take those two songs by themselves above the other 17.