I guess what I'm interested in is less a history of a man himself than a history of talking about him, which must still be extensive. I know there are plenty of (armchair) psychological reasons for peoples fascination with the actions of tyrants but I'm wondering if there is a more thorough historical explanation for his current prominence as a figure of historical interest.
I happen to come across your question in a search, but I think the answers given in this post by /u/Georgy_K_Zhukov seem somewhat related, albeit in a greater scope (WW2), rather than Hitler himself.