When we are introduced to a character in a movie or TV show, we assume that the character is supposed to be exactly who he is. It is only later that we learn what process the character went through to become the finished product we see. It's difficult to imagine the woman from The Ring as anything but crawling around with her face covered by hair.
Even before the movies, it's hard to see how anyone would interpret Gollum as a giant. The picture I got from the books was that he was short, emaciated, and terribly gross, even more so than the Andy Serkis version. See what other well-known characters were like in their formative stages at Cracked.