You should read what Churchill has to say about Chamberlain. In middle of writing himself kindly into the history books, Churchill does the same for his predecessor.
Then there's this eulogy, which Churchill gave on the occasion of Chamberlain's passing:
http://www.winstonchurchill.org/resources/speeches/1940-the-finest-hour/neville-chamberlain
For the record, I think Chamberlain screwed the pooch in epic fashion regarding Nazi Germany. I only wish that some of those who similarly oppose forceful confrontation of evil regimes today displayed the noble and heroic qualities that Winston Churchill saw so clearly in Neville Chamberlain.
ETA: I find this passage especially relevant, and moving:
It fell to Neville Chamberlain in one of the supreme crises of the world to be contradicted by events, to be disappointed in his hopes, and to be deceived and cheated by a wicked man. But what were these hopes in which he was disappointed? What were these wishes in which he was frustrated? What was that faith that was abused? They were surely among the most noble and benevolent instincts of the human heart-the love of peace, the toil for peace, the strife for peace, the pursuit of peace, even at great peril, and certainly to the utter disdain of popularity or clamour. Whatever else history may or may not say about these terrible, tremendous years, we can be sure that Neville Chamberlain acted with perfect sincerity according to his lights and strove to the utmost of his capacity and authority, which were powerful, to save the world from the awful, devastating struggle in which we are now engaged. [...] Herr Hitler protests with frantic words and gestures that he has only desired peace. What do these ravings and outpourings count before the silence of Neville Chamberlain's tomb?