The 3 I suggested were all from a 16 month period when Bob was popping amphetamines with Johnny Cash. His most famous stuff and analagous to Number of the Beast, Piece of Mind, Powerslave.
Later stuff like Desire (as mentioned) is excellent, as is Blood on the Tracks ('74, I think). I'd ignore the born-again and the rest of the 80s stuff (this is best represented in a compilation album). Time Out of Mind (from 97) is also quite good, consider it his Brave New World (Modern Times would then be Dance of Death). His new one is pretty weak though so we can't compare it to AMOLAD!