This is a genuine question not a troll - which allies of Germany behaved in a generally ok manner. Maybe using the western allies as a benchmark. I struggle to think of any who didn't participate in the holocaust or similar such atrocities.
However Finland didn't participate in any anti-Jewish or other Nazi regimen requests and didn't sign the Tripartite Pact which all the other Axis countries did.
When there are two sides, you need to choose the least worst but it doesn't mean you're like your allies.
Aside from Finland already mentioned, there is Thailand, Iraq and San Marino, who allied with Germany, but did not sign the Tripartite Pact. San Marino declared war on the Allies in 1940, but the Allies didn't declare back. These four were generally not considered that bad in terms of atrocities.
There were other countries aligned with Germany, though that was the result of being puppet-states.