Adapters for Canon or Nikon lenses on Fuji X cameras?

Have Canon AutoFocus glass as well as Nikon manual focus glass.

On the Canon AF glass, how well will it work on a Fuji X series body? Is one adapter better than another to get the AutoFocus working well?

On the Nikon manual focus lenses what adapter works well. Also, how difficult is it to focus and see it well enough to work with the viewfinder for normal street type photography? Talking 24 f/2.8, 50 f/.4, 105 f/1.8 and 600 f/4 . Older manual focus, all AI lenses.

I've got a lot of Nikkor glass that I regularly use on the Fujifilm xt bodies. Best adapter I've used is the k&f one. Not had a 600mm on there but used all the others you'd mentioned work very well without issue.