According to IMDB

Top Rated "Horror" Titles

Rank	Rating	Title	Votes
1.	8.7	Psycho (1960)	145,785
2.	8.5	Alien (1979)	183,042
3.	8.5	The Shining (1980)	180,537
4.	8.3	Les diaboliques (1955)	15,032
5.	8.1	The Thing (1982)	80,100
6.	8.1	Rosemary's Baby (1968)	51,877
7.	8.1	The Exorcist (1973)	105,144
8.	8.1	The Cabinet of Dr. Caligari (1920)	16,919
9.	8.0	Frankenstein (1931)	23,407
10.	8.0	Nosferatu, eine Symphonie des Grauens (1922)	29,471
11.	8.0	Faust: A German Folk Legend (1926)	4,542
12.	8.0	Werckmeister Harmonies (2000)	2,934
13.	8.0	Bride of Frankenstein (1935)	15,864
14.	8.0	Invasion of the Body Snatchers (1956)	14,812
15.	8.0	Dawn of the Dead (1978)	42,741
16.	8.0	Night of the Living Dead (1968)	39,400
17.	8.0	Kaidan (1964)	4,290
18.	8.0	What Ever Happened to Baby Jane? (1962)	12,580
19.	8.0	Onibaba (1964)	4,243
20.	8.0	Shaun of the Dead (2004)	136,387
21.	7.9	The Innocents (1961)	6,937
22.	7.9	Halloween (1978)	63,818
23.	7.9	Repulsion (1965)	12,913
24.	7.9	The Birds (1963)	53,017
25.	7.9	Spalovac mrtvol (1969)	1,635
26.	7.9	The Unknown (1927)	2,593
27.	7.9	The Man Who Laughs (1928)	1,383
28.	7.9	Freaks (1932)	13,917
29.	7.8	Evil Dead II (1987)	44,662
30.	7.8	Eyes Without a Face (1960)	4,799
31.	7.8	Grindhouse (2007)	83,536
32.	7.8	The Phantom Carriage (1921)	1,518
33.	7.8	The Invisible Man (1933)	8,008
34.	7.8	Vredens dag (1943)	3,461
35.	7.8	Dead of Night (1945)	3,505
36.	7.8	Peeping Tom (1960)	9,322
37.	7.8	Island of Lost Souls (1932)	1,408
38.	7.8	The Haunting (1963/I)	11,630
39.	7.8	The Wicker Man (1973)	20,705
40.	7.8	I pugni in tasca (1965)	1,015
41.	7.7	Dr. Jekyll and Mr. Hyde (1931)	3,907
42.	7.7	Häxan (1922)	2,850
43.	7.7	Vargtimmen (1968)	4,550
44.	7.7	Zombieland (2009)	84,505
45.	7.7	The Hound of the Baskervilles (1939)	3,792
46.	7.7	The Phantom of the Opera (1925)	5,738
47.	7.7	Dracula (1931)	13,647
48.	7.7	Deep Red (1975)	9,206
49.	7.7	Saw (2004)	114,467
50.	7.7	[Rec] (2007)	35,891