According to Seerath,
Name two disbelievers (Kaafir) of Makkah who supported the Prophet sallallahu alaihi wasallam, but did not embrace Islam until the end.??
Mutim bin Adiyy
1) Abu Taalib
At the age of 8 paternal uncle Abu Taalib became his guardian. He took care of him, treated him kindly and defended him for more than forty years, but when Abu Taalib died he had not come to believe in the religion of Muhammad sallallahu alaihi wasallam lest he be reproached by Quraysh for abandoning the religion of his forefathers.
Rasoolullah sallallahu alaihi wasallam cried to him, asking him to Whisper shahadah in his ears, but even then, He did not accept Islam and died as a disbeliever.
2) Mutim Bin Adiy
Narrated by Jubair bin Mutim (radiallaahu `anhu)
The Prophet (sallallaahu `alayhi wasallam) talked about war prisoners of Badr saying, “Had Al-Mutim bin Adi been alive and interceded with me for these mean people, I would have freed them for his sake.”
Mut`im ibn `Adi was a non-Muslim. His son, Jubair ibn Mut`im, however, did convert to Islam. Why did the Prophet (sallallaahu `alayhi wasallam) say such praiseworthy words about him? For more than one reason, actually. He did more to support Islam and its followers being an idol worshiper than most Muslims at the time. He provided support during the social boycott in Makkah and after the incident of Ta’if when Abu Lahab had disowned the Prophet (sallallaahu `alayhi wasallam), not allowing him to come home.