Anyone think Zooropa?
Like Pop, it has a few weak links (Some Days, parts of Babyface), but lyrically this is a really beautiful, mysterious album. Zooropa, Stay, The First Time, Dirty Day, The Wanderer, not to mention LEMON...all great.
I also love Pop and think it's very underrated lyrically.
In the end I'd probably have to go with Achtung Baby, though (don't I always?
). It's so perfect...personal and universal. The metaphors, the imagery. One is a perfect song lyrically...you don't know if he's talking about love or sex or religion or politics or the world in general. Maybe all of those. Not overrated one bit, IMO.
Other songs like So Cruel, Acrobat, and Love is Blindness have genious lyrics too.