a few actually:

Protest the Hero: Kezia(they call it a, "situationist requiem" but i think its a concept album)

Opeth- Still Life(yes that is a concept album)

Pink Floyd- Dark Side of the Moon

Pink Floyd- The Wall

Pink Floyd- Animals

Coheed and Cambria- The Second Stage Turbine Blade

Coheed and Cambria- In Keeping Secrets of Silent Earth: 3

Coheed and Cambria-Good Apollo, I'm Burning Star IV, Volume One: From Fear Through the Eyes of Madness

Coheed and Cambria-Good Apollo, I'm Burning Star IV, Volume Two: No World for Tomorrow