Best Horror Movies

[Querida]

I've watched only a handful of horror movies, I would like to know what hubbers think is the scariest...can be action as well...oh how about ranking them from scariest to least? I particularly interested in movies that are less known rather than a list of what hubbers have/have not watched....some constructive criticism is welcome as well

just to start the horror movies i have watched:
exorcist (i love this classic...mind boggling that the director was able to capture such scariness back then....so that even banned in UK grudge ( i serioulsy was scared with this one...must have been the all hallow's eve rep that day
the shining
ringu (not the english version )
the eye (had potential then died off)
poltergeist
haunted house
the frighteners (kinda mellow)
scream (I disliked the gory ones the least...it was just senseless)

i know i have not watched many of the classic ones like elm street series, zombie series, jason series, alien series...so fill me please