Personally, I really liked u/Fatpollo. They always had so many sources and links to their arguments, and I was planning go through these lists before the sub got banned. Not sure if they know about this place though.
Generally speaking, I really liked the very friendly and loving users in the sub, whose names I don't remember exactly. It made the community super welcoming.
What about you?
I remember a couple occasions where I would see his post in libertarian subs, and the "As a libertarian, I..." preamble always cracked me up.