In 1995 TLC won for Waterfalls over Scream.. then a couple years later they put out the No Scrubs video which was a Great Value brand of Scream..
But to find what Janet’s best video is you would need to find the best video from each album/era and choose from that selection:
• Pleasure Principle
• Rhythm Nation
• If
• Scream (out of compilations/side projects)
• Together Again
• All For You
• All Nite Don’t Stop
• So Excited
• Feedback
• No Sleeep (or Dammn Baby, idk they’re both bland)
But out of that list it’d have to be between RN, If or Scream... and in terms of the recognizability and iconic status I’d say that RHYTHM NATION is Janet Jackson’s greatest music video of her career