As of my last knowledge update in September 2021, there were several notable Hindi novelists who were actively writing contemporary fiction. However, I do not have information on authors who have gained prominence or started writing after that date. Some Hindi novelists who were well-known up to 2021 include:
1. Chetan Bhagat: Known for bestsellers like "Five Point Someone" and "2 States."
2. Amish Tripathi: Famous for the "Shiva Trilogy" and "Ram Chandra Series."
3. Durjoy Datta: Known for novels like "Of Course, I Love You" and "The Boy Who Loved."
4. Ravinder Singh: Author of "I Too Had a Love Story" and "Your Dreams Are Mine Now."
5. Preeti Shenoy: Known for books like "Life Is What You Make It" and "The Secret Wish List."
Please note that the popularity and activity of authors can change over time, so I recommend checking the latest literary news and bestseller lists for updates on contemporary Hindi novelists.