As for specific planets, I think only Dagobah would qualify as safe for a Jedi, as the only known sentient being on the planet was an old Jedi Grand Master.
There is also Alderaan, where at least one Jedi safely hid for a time, but this had a bad ending for him and his host.
The problem is not really the local population's attitude toward Jedi, but the extent of the Empire's power on those worlds. Kashyyyk is a good example: although the locals were sympathetic towards Jedi, most had been enslaved by the Empire.
The only relatively safe place for a Jedi would be beyond the reach of Imperial influence, but the number of worlds under the Empire's control had been increasing; during A New Hope, there were more worlds in the Empire than had once been in the Old Republic. Some planets like Tatooine, where, during The Phantom Menace, Republic laws held no power, had their own governors by A New Hope.
Even if a planet outside of the Empire's influence was found, it would not be safe from denouncement and spies. There was, additionally, the threat of bounty hunters; Boba Fett was known to have collected several lightsabers he had taken from Force-sensitives over the course of his bounty hunting career.