Here are the Top 12 concept albums as voted for by @lpgrp characters:
1st (19 votes) David Bowie's The Rise & Fall of Ziggy Stardust & the Spiders From Mars
2nd (15 votes): Grandaddy's The Sophtware Slump
3rd= (14 votes): Mountain Goats' Tallahassee, Antlers' Hospice, Marvin Gaye's What's Going On, Lou Reed's Berlin
7th (13 votes): Neon Neon's Stainless Style
8th= (12 votes): XTC's Skylarking, Lift to Experience's Texas Jerusalem Crossroads & The Magnetic Fields' 69 Love Songs
11th (10 votes): Luke Haines's 9 1/2 Psychedelic Meditations on British Wrestling of the 1970s and Early 1980s.
12th (9 votes) The Streets' A Grand Don't Come For Free