Janet is very iconic. She has songs like "Nasty" & "Rhythm Nation" -- the latter's era even influencing her brother Michael. Janet has an iconic Rolling Stone cover that is today still copied & one or more of her albums make various All-Time Rolling Stone & Rock & Roll Hall Of Fame lists. She is known as a captivating performer who has most visibly influenced the likes of Britney Spears and helped widen the lane for various dancer-singers. Janet has made an impact on the dance world, influencing a whole generation of dancers to find inspiration in her iconic dances (Rhythm Nation, If). She has really solidified herself in pop culture, and although her nipple accident has muddled it (while simultaneously contributing to it), she is working to making a successful comeback with her brand as a touring artist.
At the moment Janet is more iconic than Beyonce, but Beyonce is not so easily suffocated by Janet's status. Beyonce has etched her own marks in history and when all is said and done, she might be able to surpass Janet. But to really think Beyonce is more iconic now when Janet still has things that endure longer than Beyonce's whole career (DC included) is just silly.
Let's get serious here people.