Atom Heart Mother was ok, the title track and Summer 68 were great, the other songs just sound more like musical concrete pieces rather than actual songs.
Other than that i disagree, i think their 70s stuff got a lot better than the post Syd stuff they did in the 60s, like More and Ummagumma...Meddle was the first truely great album they did after Piper At The Gates Of Dawn, and Dark Side Of The Moon was even better...I also rank Wish You Were Here and Animals among their best work...And even though their last 2 albums, Momentary Lapse Of Reason and The Division Bell are nothing great, i would certainly say they were better than The Final Cut, which is their worst in my opinion.