I wanted to recommend infosec.pub where I'm at, they have only defederated from extremist & cp crap. Overall not even 10, however lemmygrad is included (which I consider a blessing), that would probably be the only controversial one.
you are literally in such instance, we have only blocked cp or extremists so far. But you can easily switch to any other instance ;D its the magic of lemmy. If you wait until 0.19 then you can even export all your settings, blocks and subscriptions