What makes you refer to these albums as being Overated"? The simple fact that it is your personal preference that you don`t like the songs on these albums as much as you like the songs on other albums. Does that actually make the albums that you list above as being overated? I personally don`t think so.
Albums you mention like "Blackheart Man", "Satta Masagana", "Life Of Contradiction", "Songbook", "King Tubby Meets Rockers Uptown" (and many others I could name) have all been highly rated by people like David Katz, Steve Barrow and others who are well respected authorities on reggae.
So rather than just dismiss them as being overated why not look a bit deeper at the circumstances that has lead to them being so highly rated in the first place. Who knows you may learn something
There is a world of difference between "Overated" and "I personally don`t like"
I probably haven`t explained myself to well but I can certainly understand why these albums have their high status in the annuls of reggae history.