First of all, Eichmann and Mengele were NOT part of Operation Paperclip. Eichmann was later captured in Argentina, shipped back to Israel, and executed. Mengele got away, unfortunately, and drowned in 1979, but he didn't escape through Paperclip. Perhaps YOU are the one who knows nothing about history. I have a degree in history, and a lifetime of learning, but I'll admit that I am still learning every day.
Nuremburg tried a relative few, because it mostly focused on the High Command, and most were sentenced to death, but there were thousands of Nazi executions across Germany, following the war. So many Nazis were executed that the actual number is unknown, but it is in the thousands.
Concentration Camp guards and administration were often executed on the spot. The Dachau prisoner riot is famous. Immediately upon liberation, many prisoners beat guards to death with shovels. Allied soldiers began lining up guards against a wall, and shot them.
Many other Nazi soldiers across Germany were captured trying to escape, and immediately executed, following a quick military hearing. A favorite method was a short drop hanging, in which the drop isn't long enough to snap the neck, so the person dangles, and slowly strangles to death.
Some got away with it, MANY did not.