I can't help much with the first one, but I've seen at least a few fics about brainwashed!Harry.

http://archiveofourown.org/works/3615288 Vincit Qui Se Vincit by Deviant_Accumulation - I don't know if this will ever be finished, but what they've written so far is awesome.

http://archiveofourown.org/works/3697664 down dark tides the glory slides by Fideliant - I love this fic, but then again I love almost everything Fideliant has written in Kingsman