I really like all of the ones the OP mentioned except Let's Kill Hitler. I thought that one was horrible. The pacing was what ruined it for me. Too much happened to fast, and the title was pointless because Hitler was never mentioned again in the episode after they shoved him in the closet. The setting was really pointless.
Blink, Silence in the Library and Forest of the Dead (I love River Song) are my favorite! But I also love Midnight, The Eleventh Hour, The Time of Angels and Flesh and Stone (I love River Song), and The Lodger.