I am, in all honesty, someone who has never read a comic. I have however watched all the movies and tv shows based on the comics that I can. This has lead me to think of a unique theory as to who Dr. Harrison Wells is.
I believe Harrison Wells is a member of "The Legion" who I first saw in Smallville. I believe that Dr. Wells lost his ring, or it was stolen by the Reverse Flash, around the same time Barry Allen's mother was killed.