Yes there were a few people who got acquitted. None of the "big ones" Goering, Hess, Speer, etc. got off, it was mostly small time Nazis who had either abandoned the movement early on, or had played such a small role, it was too hard to find evidence. There were only three to get acquitted.

One was Hanz Fritzche, easily the most insignificant Nazi to be tried. He worked as a radio host for the propaganda department, he did get several promotions, but he was never in any sort of major position of power.

The next was Franz Von Papen. He had been a political opponent of Hitler early on, and served as chancellor before Hitler and served as Hitler's vice chancellor. He was quickly marginalized and was almost assassinated during the Night of the Long Knives. He served as ambassador to Austria and Turkey. He was acquitted at Nuremberg, but eventually he was re branded a war criminal and did end up serving some time.

Finally there was Hjalmar Schacht, he was primarily responsible for building up the German economy and allowing rearmament to happen. He eventually had a falling out with Hitler over rearmament and was dismissed. He was eventually put in a concentration camp during the purge that happened after the July 20th Bomb Plot.