That creature from the Ring movies was pretty iconic, but I guess that was early 2000s just after your deadline so not much difference.
Horror movies probably ebb and flow with styles. A lot of the iconic baddies in the OP came out of a specific generation of horror, like 1970 through 1985 just about. This was also sort of the age of the serial killer, like that whole idea of a deranged person lurking around the neighborhood who wanted to kill was still a relatively fresh concept. Combined with existential threat of nuclear war, I think people were really open to these monstrous iconic villains.
I still think the scariest movies from that era were the Exorcist and the Shining. Which don't really have iconic enemies. Sure, Jack Nicholson is iconic in that movie but for a lot of reasons other than those that make, like Jason or Freddy iconic. Same with, say, The Silence of the Lambs (another movie I find generally scarier than almost all of those in the OP)
Horror movies probably ebb and flow with styles. A lot of the iconic baddies in the OP came out of a specific generation of horror, like 1970 through 1985 just about. This was also sort of the age of the serial killer, like that whole idea of a deranged person lurking around the neighborhood who wanted to kill was still a relatively fresh concept. Combined with existential threat of nuclear war, I think people were really open to these monstrous iconic villains.
I still think the scariest movies from that era were the Exorcist and the Shining. Which don't really have iconic enemies. Sure, Jack Nicholson is iconic in that movie but for a lot of reasons other than those that make, like Jason or Freddy iconic. Same with, say, The Silence of the Lambs (another movie I find generally scarier than almost all of those in the OP)