I've seen so many but only going by the ones I've rated, and not including the Christmas & Holiday specials.
9/10 -
Duel (1971 TV Movie)
The Deadly Tower (1975 TV Movie)
The Legend of Lizzie Borden (1975 TV Movie)
Helter Skelter (1976 TV Movie)
Where Have All the People Gone (1974 TV Movie)
The Two Worlds of Jennie Logan (1979 TV Movie)
The Boy in the Plastic Bubble (1976 TV Movie)
Message to My Daughter (1973 TV Movie)
Something for Joey (1977 TV Movie)
8/10 -
The Screaming Woman (1972 TV Movie)
The Death of Richie (1977 TV Movie)
The Night Stalker (1972 TV Movie)
The Night Strangler (1973 TV Movie)
The Rutles: All You Need Is Cash (1978 TV Movie)
The Glass House (1972 TV Movie)
Dead of Night (1977 TV Movie)
Bad Ronald (1974 TV Movie)
Sooner or Later (1979 TV Movie)
7/10 -
Reflections of Murder (1974 TV Movie)
The House That Would Not Die (1970 TV Movie)
Snowbeast (1977 TV Movie)
KISS Meets the Phantom of the Park (1978 TV Movie)
6/10 -
Salem's Lot (1979 TV Movie)
5 and below -
A Howling in the Woods (1971 TV Movie) - 4/10
Deathmoon (1978 TV Movie) - 4/10