Here's my list:
Best - 2: Unforgettable Fire, Joshua Tree, Rattle & Hum
2nd - 1: Boy, War, October
3rd - 3: Achtung Baby, Pop, Zooropa
4th - (5): Songs of Innocence, Songs of Experience?, ?
5th - 4: ATYCLB, HTDAAB, NLOTH
I *already* put Songs of Innocence -- the first in their next album...