I am making this post as a response to a comment on another post. I will list what I know and can confirm so far:
President Trump: https://gab.com/realdonaldtrump
Sidney Powell: https://parler.com/profile/SidneyPowell/posts
Lin Wood: https://parler.com/profile/linwood/posts
General Michael Flynn: https://parler.com/profile/GenFlynn
CodeMonkeyZ: https://gab.com/codemonkey - https://parler.com/profile/CodeMonkeyZ1
Tommy Robinson https://parler.com/profile/TommyRobinson/posts
Gateway Pundit https://parler.com/profile/GatewayPundit/posts
Amy Mek https://parler.com/profile/Amymek/posts
Mike Flynn jr https://parler.com/profile/mflynnJR/posts
Ivan E Raiklin https://parler.com/profile/Raiklin/posts
Devin Nunes https://parler.com/profile/Devinnunes/posts
Rudy G https://parler.com/profile/RudyG/posts
Dan Bongino https://parler.com/profile/Dbongino/posts
OAN https://parler.com/profile/OANN/posts
I saw that Trump apparently had a Parler but I cannot confirm that's him. He should have the Yellow P next to his profile pic if it is. But it doesn't so I am not listing it.
Feel free to add accounts that you all find too.
Just joined Parler and was looking for these fine people, your post is very much appreciated!
Glad I can help! :)