Growing up in South Jersey I remember Dr. Shock on Saturday nights out of Philly back around 1970 or so.
Sammy Terry in Nightmare Theater in Indianapolis, started in 1962. His son took over in 2010.
I also remember Dr. Shock. His format was similar to the one used by Svengoolie today. He had segments during the movie where he did magic tricks, told corny jokes, and had guest stars. Unfortunately, he passed away suddenly from a heart attack at the age of 42.
Another Philly favorite was "Saturday Night Dead" hosted by Stella, "The Maneater From Manayunk." (Manayunk is a neighborhood in Philadelphia.) Her show ran during the 1980s.
I vaguely remember Dr demento