I loved the last train!!!!My parents also let me watch basically anything they were watching.
I watched The Bill right from small kid age to when it finished!
The Last Train - about a group of people who are on a train which survives the apocalypse - stayed with me for years after seeing it as a kid. Not in a traumatic way, it just stuck with me.
I also watched both Event Horizon and The Shining with my dad when I was only about 11!
Funnily, I don't think I was particularly scared by either back then but rewatching Event Horizon as an adult put the wind right up me
The one thing that traumatised me was this https://www.imdb.com/title/tt0092115/ it has the original Harry Potter in it, I was about 9 and scarred for years...