Horror comics were really popular in the 1950s. But the frightening images caused controversy with parents' groups and censorship ensued. The whole horror comics boom in American comics lasted just a short time, four or five years.
The book, Four Color Fear, Forgotten Horror Comics Of the 1950s, has a couple dozen great examples.
I found a few online to illustrate this posting. These stories are not from the book.
There's something very Halloweenish about these stories: ghosts swirling up out of their graves in search of vengeance, evil spirits awaiting a murderer to transport him to Hell, or a woman who becomes a witch to seek revenge on the man who jilted her.
We begin with a one-page story on Halloween superstitions...
A great place to find horror comics is The Horrors Of It All blog. At THOIA, as it's known, it's Halloween all year long.
"Halloween," Witches Tales #18;
"The Dark Passage," Adventures Into Terror #10;
"The Dead Don't Sleep," Adventures Into Terror #30;
"Death By Witchcraft," Witches Tales #4.