Well here goes some:
Romero's Classics
Night of the Living Dead (1968)
Dawn of the Dead (1978)
Day of the Dead (1985)
Peter Jackssons old movies
Bad Taste (1987)
Braindead (1992) (also called Dead Alive)
Raimis Evil Dead Triologi doesnt have zombies in droves but are good, Army of Darkness (Evil Dead III) are closer to it thou
One movie that really owns imo is the zombie parody mive "The Return of the Living Dead" from 1985, very funny and lots of zombies that geat beaten up
A movie I havent seen but will try to is "Night of the Day of the Dawn of the Son of the Bride of the Return of the Revenge of the Terror of the Attack of the Evil, Mutant, Alien, Flesh Eating, Hellbound, Zombified Living Dead Part 2: In Shocking 2-D (1991) (USA: complete title)" , with that title it must be good... or?
/Ardbeg of AB