Your latest suggested text is fine, but I think it should explicitly mention that some reviewers, etc. interpret Elsa as lesbian, similar to your "some reaction to the movie has focused on the perceived image of Elsa as a lesbian, gay, or bisexual character."  proposal. So where your latest proposal states "while other commentators believed the main character, Elsa, represented a positive image of LGBTQ youth, viewing the movie and the song "Let It Go" as a metaphor in some capacity for openness," we could add "while other commentators believed the main character, Elsa, represents a positive image of a lesbian, gay, or bisexual character, viewing the movie and the song "Let It Go" as a metaphor in some capacity for openness." Notice that I changed "represented" to "represents," since it's not a past matter; it's an ongoing matter because Elsa always exists in that fiction.