It's possible:
* It's a lesser-known poem: There might be a poet who wrote it but hasn't achieved widespread recognition.
* It's an original poem: You might have come across a poem someone created themselves and called it "The Greatest Artist."
* It's a misattribution: There might be a poem with a similar title or theme that you're thinking of.
To find the author, you'd need to provide more context:
* Where did you encounter the poem? (e.g., a book, website, social media)
* Can you share any lines from the poem?
* What is the theme of the poem?
With more information, we might be able to track down the author.