Imam Nisai also wrote these narration that Ali is the most beloved person for the Holy Prophet among men and Lady Fatima is most beloved one for the Prophet (pbuh) among women.
Sayyidina Buraydah (RA) reported that the dearest to Allah’s Messenger (SAW) among women was Fatimah and among men was Ali. Ibrahim said that this meant from ‘people of his household.’
Imam Tirmidhi graded this as Hassan Hadith.
Here is another narration:
Jumay’ ibn Umayr Taymi reported that he went to Sayyidah Ayshah (RA) with his paternal aunt. He asked her, “Which one of the people was dearest to Allah’s Messenger (SAW). She said, “Fatimah.” She was asked, “And of the men?” she said, “Her husband. And I know he was much given to fast and to stand (in salah).