Hess tried to broker a peace deal. I personally don’t think he should have spent his whole life in jail. He probably tried to do some good. The others obviously deserved their fate, or if anything, got off lightly, as in the case of Speer.
Hess was a bit insane and should have served some time for being Hitler's right hand in the early war years but life was a stretch given that he surrendered himself to the British and tried to broker an unauthorised peace deal. The Soviets insisted he serve his life term whilst the British, Americans and French wanted to release him to West Germany.
Like Evans, Speer was a liar and opportunist. He admitted to the crimes he had to confess to but made a lot of self-beneficial claims that were impossible to verify, such as him confessing to Hitler he had deliberately disobeyed his orders to destroy cities and assassination attempts he claimed to have attempted on him. He was disillusioned with Hitler but so were Himmler and Goering. I hate the image he cultivated of himself as the "good Nazi".
Speer confessed his full guilt to some of his crimes but often with the Evans-style implication that others did much worse. "yes I designed the concentration camp system and built up German armaments, but if you are going to hold me accountable, what about Dr Goebbels? Goering!? Himmler knew about & supported the Holocaust! Doenitz actually was appointed by Hitler as his successor! Not me! Hitler hated me in the end which means I can't be all that bad!"