Given that sunaurus has explicitly declined to defederate from unpopular and highly-blocked instances, stating that disliking content is not a reason to invoke defederation, I’d have to say this is the least-censoring instance I’m aware of. At least at the admin level.

At the community level, communities can moderate and censor themselves however they like, but I certainly can’t think of any examples I’d call censor-heavy.

Lemm.ee is pretty awesome and allows me to browse the lemmiverse basically uninhibited. Could not be happier with how it is run

Less here than any other instance I’ve noticed. It’s why I like this instance. World, ml, beehaw, and hexbear all use defederation and banning at the drop of a hat. They’re all trying to cultivate specific identities for their instances, so I don’t begrudge them for it exactly, but it’s not for me. I like the lack of censorship here and the openness. It makes the instance generic, but in a cool way. It’s like the Union Station for the fediverse, or a skeleton key. If a user doesn’t like a corner of the fediverse, they can block it themselves now, from individual users to whole instances. Sh.itjust.works might be like it, too, I haven’t looked too much into their policies.

It’s enough to make me realize I should donate to this place more lol.

No? Why do you ask?

Not at all. If anything, lemm.ee tends to accept more viewpoints than most other instances.

Unless you mean censorship like banning CSAM. In which case, yes, but its welcome.