system
A chat on 4chan
human
Shrouded Hand
Obsolete Oddity
Lights Out Podcast
The Paranormal Scholar
Rob Gavigan
Hailey Elizabeth 
Hailey Reese
Jessii Vee
Dark 5 (and it's spinoffs - see attached image)
Disturban and Disturban History
Reddit Aliens/Dr Hollowed
Jake Webber
All Time
Wendigoon
Lazy Masqerade
All Time
Loey Lane
Buzzfeed Unsolved/Watcher 
Chills/Top 15s
Nukes Top 5
Sir Spooks
Corpse Husband 
Mr Nightmare

To name a few
gpt
I would say Nuke's Top 5 is the best channel to watch for ghost videos, by far, even though it's recently suffered from the proliferation of hoaxes and art projects so there can be a full countdown's worth of content to put out. There are just so many fake videos flooding the Internet now that he doesn't really have a choice if he wants to keep the format going.