I agree. MOP was the best. "Ride the Lightning" a very close second. The Black album was decent, but after that it was ALL downhill.
It'd put "Ride the Lightening" second and "...And Justice for All" at third.
I remember seeing Metallica on the "Ride the Lightning" tour - at a small all-ages club on the south side of Indy in early '85.
The opening act was Armoured Saint (with Jon Bush on vocals, who went on to front Anthrax after the departure of Joey Belladonna), followed by Metallica, and the headliner was W.A.S.P. of all things. ("I f**k like a beeeee-east!")
Take THAT, Tipper Gore!