No doubts, Hazrat Ayesha was one of the beloved wifes of the Prophet (pbuh). However when we study Sahah Sittah and the books on Aqaid of Islam we find out that Hazarat Khadija was the most beloved wife of Rasulullah (pbuh)
The Most Beloved Wife:
ref:
In Sahih Bukhari Hadith: 5.166 Ayesha (ra) herself narrates:
"I did not feel jealous of any of the wives of the Prophet as much as I did of Khadija though I did not see her, but the Prophet used to mention her very often, and whenever he slaughtered a sheep, he would cut its parts and send them to the women friends of Khadija. When I sometimes said to him, “(You treat Khadija in such a way) as if there is no woman on earth except Khadija,” he would say, “Khadija was such-and-such, and from her I had children.”
Mullah 'Ali Qari’s Sharh Fiqh Akbar (Book of aqaid) . On page 143 he cites the following tradition from Tirmidhi:
Ibne Abbas narrates that he heard Rasulullah (pbuh) “There shall be four Leaders of Women in Paradise, Maryum daughter of Imran, Fatima daughter of Muhammad, Khadija daughter of Khuwaylid and Asiya wife of Pharoah”
Rasulullah (pbuh) had also said: “The most excellent of the women of all worlds whom Allah chose over all women are: Asiya the wife of Pharaoh, Mary the daughter of Imran, Khadija the daughter of Khuwaylid, and Fatimah the daughter of Muhammad”
Please also check:
Sunan al-Tirmidhi, v5, p702
al-Mustadrak, by al-Hakim, v3, p157, (who said this tradition is authentic based on the criteria of two Shaikhs (al-Bukhari and Muslim);
Musnad Ahmad Ibn Hanbal, v3, p135
Hilayat al Awliya, by Abu Nu’aym, v2, p344
al-Isti’ab, by Ibn Abd al-Barr, v4, p377
In Yanabi al Mawaddah Part 1-3 (Combined) page 203, Chapter 55 “Fadail Khadijathul Kubra and Fatima Zahra” Shaykh Sulayman Qundoozi cites this reference from Mawaddatul al Qurba:
“Ikrima narrates that Rasulullah (pbuh) drew four lines into the ground and then asked ‘What is this?’ Those present replied ‘Allah and his Rasul know best’. He (pbuh) replied 'Of the women in Paradise the most superior are ** Khadija**, Fatima, Maryam and Asiya”.
The Most Beloved Person In The Eyes Of Rasulullah (pbuh):
When seeking to identify the most beloved in the eyes of Rasulullah (pbuh) one need to look no further than the Qur’an. Allah (swt) states the duty that has been placed on the Muslims:
Say: “No reward do I ask of you for this except the love of those near of kin.” (42:23).
Jalaladin Suyuti in Tafsir Durre Manthur under the commentary of this verse records the following:
Abdullah ibne Abbas narrates ‘When this verse descended the people asked who are these close relatives whose love had been made compulsory?’ Rasulullah said they are ‘Ali, Fatima, Hasan and Husayn’.
Other leading lights of Ahl’ul Sunnah have also conformed that this verse came down in respect of these four individuals:
Hilayat al Awliya page 201 Volume 3
Mustadrak al Hakim Volume 3 page 172
Sawaiq al Muhriqa page 101
Usdul Ghaba page 367 Volume 5
Kanz al-`ummal page 217 Volume 1
Clearly these four individuals are the most beloved to Rasulullah (pbuh) to the extent that Allah (swt) has declared love towards them as the only wage required by Rasulullah (pbuh), for providing the ummah with Allah’s message - Islam. Therefore, their love is a part of the Deen. If Hadhrath Ayesha was indeed the most beloved then why has Allah (swt) not stipulated love towards her as a duty upon the Muslims in the same way He (swt) has for Imams Ali , Imam Hasan , Imam Husayn and Sayyida Fatima?
Hadhrath Ayesha herself told Jami bin Umair who the most beloved to Rasulullah (pbuh) were.
He narrates: 'I accompanied my aunt and approached Hadhrath Ayesha and asked her ‘Who was the dearest among the people to Rasulullah?’ she replied ‘Fatima’. I then asked 'And amongst men? She replied ‘Her husband’.
Mishkath al Masabih Volume 3 page 257 (Urdu translation Fareed Bookstall Publishers, Lahore):